AEM Tuning.

[empera]

Didn't see a thread directly involved with tuning. I'll be the first to say that I'm not a professional and i shouldn't be attempting to tune, especially under boost. But i have a small understanding of whats going on. So my question is, the car is pretty much tuned to idle and its able to rev pretty smoothly but i am wondering how can i make it drivable enough to take to a shop to get tuned? Should i use the auto map feature or should i just use the follow ecu option to add or remove fuel at certain points?

Anyway if you have any useful information or if i should have posted this in a diff. thread/forums please let me know.

Thanks
-emp.

[turbo joe]

You can post pretty much whatever you want here regarding standalone ECUs. :)

As to your question...short of finding a shop that has a map for a setup that's identical to yours (and is willing to part with it), IMO, you would be best off to tune it as much as you can -- driveability-wise -- before you take it to a dyno.

Just do it the old-fashioned way...drive it around and add or subtract fuel from the cells you're in at a given time until you find the rich and lean drop off points(stumbles from being too rich or too lean). For part-throttle and tip-in throttle, just go up from the lean stumble until you get smooth and crisp throttle.

[figgie]

a bit of advice.

The cells should be smooth from one cell to the next. If you look at your fuel inj in a 3d graph, it should be smooth. No jagged teeth/edges.

[empera]

^^ yea i remember reading the same but thanks for the tip.

Anyone using the EMS/boost solenoid combo to control boost? I have a AC Delco boost solenoid and will be trying to use it to control boost. Except to me it looks a bit confusing. But then again i havent read up much on the topic. If anything should i just got back to the TruBoost? Actually what i want to do is start with spring pressure and go from there.

[chevyeater]

I'd say skip the EMS boost control unless you can't fit tires that hook under your car and have to use VSS based boost.

As for the driveability tuning, just take it one step at a time. If it revs clean sitting still, it shouldn't take too much work to make it driveable. Automapping can be more confusing than the old fashioned way.

[empera]

ah...ems boost control is that bad huh...might hafta go back to the good ol' truboost which i did love heh

it does rev pretty clean so i might just cruise and tune the old fashion way...

Thanks for the tip brian.

[rcboricua07]

hey i was just wondering for those using the aem ems, the communication cable that connects from the engine management system to the laptop mine doesnt fit into my laptop is there an adapter or something i can buy to have the cable connect to my laptop i know it sounds stupid but i tried it on another laptop and it was the same situation???

[turbo joe]

I assume you have a serial cable? Most newere laptops don't have a serial port anymore, but you can buy a serial to USB adapter at Best Buy.

http://www.bestbuy.com/site/olspage.jsp?_dyncharset=ISO-8859-1&id=pcat17071&type=page&st=serial+adapter&sc=Global&cp=1&nrp=15&sp=&qp=&list=n&iht=y&usc=All+Categories&ks=960

BTW -- I moved this to one of the (many) AEM threads. I'm thinking it would be better if AEM info was in a few threads, rather than like...fifty...LOL

[empera]

or u can get a PCMCIA serial card :) which works for me and i have my usb ports free.

[rcboricua07]

or u can get a PCMCIA serial card :) which works for me and i have my usb ports free.

wat exactly is that? and how does it work..also i heard that you may sometimes lose information when using an adapter i believe i was told sometimes it doesnt transfer over idk

[empera]

it goes into the pcmcia card slots...

[empera]

Hey i have a Tial 44mm wastegate and AC Delco/GM Boost solenoid, how should i hook up the vacuum lines?

[empera]

ok new problem :-/
So the car was idling a bit lean and i tried to correct that so i started playing with the warm up enrichment table and the fuel map table. After i tried to start the car it would start and idle for a few seconds, go lean and stall out. Fuel pressure would go up and then drop to 0, seems like the fuel pump was cutting off. I then connected the fuel pump directly to 12 volts and worked. I tried starting the car this way. Idled fine again. So what could be causing this problem?

[X-man]

On the box for the 87-88 Supra 30-1110 pin 7C or ls#1 is the fuel pump relay enable and 21C or ls#11 is for the circuit opening relay/ fuel pump control. Make sure that none of the parameters have been changed on these low side outputs. Go to Options and then Configure outputs and make sure that they are active. This is assuming that you have not changed any of the factory wiring. Mine I use the circuit opening relay and this triggers a relay I have in the trunk where my battery is to run bigger feed wires to my Aeromotive pump.

Sean



ok new problem :-/
So the car was idling a bit lean and i tried to correct that so i started playing with the warm up enrichment table and the fuel map table. After i tried to start the car it would start and idle for a few seconds, go lean and stall out. Fuel pressure would go up and then drop to 0, seems like the fuel pump was cutting off. I then connected the fuel pump directly to 12 volts and worked. I tried starting the car this way. Idled fine again. So what could be causing this problem?

[husaman]

wat exactly is that? and how does it work..also i heard that you may sometimes lose information when using an adapter i believe i was told sometimes it doesnt transfer over idk

I have an AEM and found that neither PCMCIA card and or adaptor DO NOT work ....I had to go out an buy an OLDER style laptop with the 2 row 9 pin Serial port .....thats the only way i could get my ECU to connect with the Laptop...funnt thing was when I went to the used computer shop to ask for a laptop with this style port ...they said ..."oh ..you must be tuning a car" Seems to be common and VERY common with AEMs. All works fine now ...cost me a new/OLD laptop

[turbo joe]

It's the adapters...

Some USB adapters work with some ECUs and some don't. I would contact AEM and ask them which adapters have been tested to work.

OTOH, you can buy a suitable used laptop with a serial port for 100-200 bucks. I bought one a while back (for the dyno) from Craig's list. Dynojet says "No USB adapters" right in the manual.

[empera]

i logged a quick drive around to see how everything is behaving but its not logging my engine load?? any ideas why this might happen?

[simpsons7s]

It's the adapters...

Some USB adapters work with some ECUs and some don't. I would contact AEM and ask them which adapters have been tested to work.

OTOH, you can buy a suitable used laptop with a serial port for 100-200 bucks. I bought one a while back (for the dyno) from Craig's list. Dynojet says "No USB adapters" right in the manual.

I got my USB to work with AEM, but then I get memory dump and fatal errors when connected sometimes. Never had a problem with the older stuff. Do you suggest any specific laptop? ie: Dell, hp, or mac?

[empera]

i logged a quick drive around to see how everything is behaving but its not logging my engine load?? any ideas why this might happen?

Anyone??

[X-man]

Anyone??


As long as you are unlocking the parameter box and making sure engine load is in the parameter box/section you unlock it should log. I go under ignition parameters and unlock this just because it is pretty much setup for parameters you would want to watch anyways. I had a problem once that it wouldn't log anything but it just wouldn't start logging when I pressed F6 or sometimes it wouldn't stop logging again when F6 was pressed. I rebooted my laptop and it was fine.

Sean

[suprawalt]

i was just curious.can you pull codes with the aem ems?thanks walter

[turbo joe]

i was just curious.can you pull codes with the aem ems?thanks walter

You generally don't "pull codes" with a standalone, but they all have some sort of rudimentary diagnostic function. The difference is that you can see what's going on directly on your laptop.

Some may have a check engine light function to alert you of a problem or fault, but you access all the information via the same means that you tune it (serial or USB connection).

[MRSUPRA]

I'm in the middle of having an experienced tuner tune my AEM. He has tried so many things and can't get rid of the misfire symtems at light throttle. It's happening anywhere from idle to about 3k RPM, but goes away when you give it more gas.

It looks like this was covered on the AEM forum a while back.http://forum.aempower.com/forum/index.php/topic,8345.0.html.
So I was wondering if there was any one answer to this problem?
Thanks.

Matt

[turbo joe]

I'm in the middle of having an experienced tuner tune my AEM. He has tried so many things and can't get rid of the misfire symtems at light throttle. It's happening anywhere from idle to about 3k RPM, but goes away when you give it more gas.

It looks like this was covered on the AEM forum a while back.http://forum.aempower.com/forum/index.php/topic,8345.0.html.
So I was wondering if there was any one answer to this problem?
Thanks.

Matt

Pretty much...if it happens at light load, it's not gonna be an ignition problem. In my experience, they don't really disappear when you add load, they get worse.

If you have a solid tach reading, it's not likely the crank trigger either. If I had to guess...it's a tuning deal. People chasing some air/fuel ratio, instead of just tuning the dang thing. LOL

[turbo joe]

Dunno why this didn't bump up when I replied...

[MRSUPRA]

What is going on?? I started a new thread and it was moved here. But it's not here.

[turbo joe]

What is going on?? I started a new thread and it was moved here. But it's not here.

We already have an AEM tuning thread...and several other AEM-related threads, so I moved it to the most relevant one.

It's right above where you posted...or at least for me it is. :D Let me try approving it and see if it shows up. I didn't think I had to do that if I merged it. I'm sorry for any confusion.

[MRSUPRA]

Just an update on my light load/low rpm misfire issues. I had X-man give me some helpful info. It seems that my issues are very common on some 7m's with AEM. I adjusted my crank and cam sensitivity and it definantly helped, although not completly yet.

[Zazzn]

For the USB cables.. I have a belkin, and it seems to not work but the prolific cheap 10$ brand one works same with some other PLxxx brand one... so cheaper brand FTW the belkin was well over 60$

[empera]

so where should my timing be at full boost 13psi ( i think it spiked to that ), 5400rpm (terribly high), afr at 10.8:1 (needs to be a bit leaner). ATM the ign. timing is showing 16.40 right there.
I should really read up on this but just trying to see what you guys say.

[Zazzn]

sounds fine to me... sounds like you could have more timing. I know my map is way more timing at 13 PSI i think at 15 PSI i'm in the 22 Degree range at 4000 RPM.

but i'm not sure if 22 is a good or bad thing, I'm waiting for John Reed to tune my car on the 9th of oct.

[figgie]

Zazzn

you know you can check yourself right? :)

Read the spark plugs! They never lie!

[empera]

im gonna hafta get someone to look at my logs and tell me wat i can do to fix my lag issue

[foreverpsycotic]

im gonna hafta get someone to look at my logs and tell me wat i can do to fix my lag issue

Post up the logs and your map in a zipped folder. I should still have the software on my laptop.

[empera]

http://home.comcast.net/~emp00/supra.rar

current map and couple of logs. Please help! hehe

[Terry steward]

Hi folks,i have found the thread i needed,im not very computer literate,sorry in advance.

anyway, i have an aem,and as my rebuilt engine,is nearly run in,i was looking to have it fitted and mapped,but was told by someone i approached,that there has been a number of problems with the aem losing its timing map,and causing damage to people,s engine,s as a result., has anyone heard of such problems ?, cheers, terry

[figgie]

Terry

the issue is that reported problems really reported problems or user induced problems?

Kind of hard to filter the noise of which is which.

[Terry steward]

Terry

the issue is that reported problems really reported problems or user induced problems?

Kind of hard to filter the noise of which is which.

oh i see,well,it was just a tuner had,had these problems,and was reluctant to deal with the job,because of his experiences with the aem,and i was just wondering if anyone on the forum,had experienced the same,or heard of anyone having such trouble,im not sure if the manufacturers would volunteer or admit there has been such problems. it was just that the states is a bigger country than the uk,and the chances of getting some info or feedback, would be greater on this rather than the uk forum,there is probably a lot more people running the aem your side of the pond than my side.

[figgie]

manfacture? Just look at the AEMpower forums... plenty of help there. Again remember. The more of one product the more likely there will be more issues reported as it is available to more people.

[Zazzn]

Zazzn

you know you can check yourself right? :)

Read the spark plugs! They never lie!

yeah but spark plugs change almost instantly!

[foreverpsycotic]

Someone correct me if I am wrong, but empera, your timing does look a bit on the mild side. That, and there is a giant indent in the timing map, looks like someone took a bite out of an apple. Personally, I would add a little more timing, but I would check with someone a little more experianced than I before you go about doing that.

See if you can log timing as well, I would love to see what it is doing in the log vs engine speed, engine load, o2 and throttle.

BTW, what is your full setup (A/R, cams and whatnot)

[empera]

hey man sorry i was pretty drunk last nite. let me know wat if u see anything on that other log that i should correct.

[empera]

ok so today i got everything back together and took the car out for a ride...changes made were, i now have a mechanical boost gauge, welded full 2.75" ic pipes and a Tial 50mm bov...heres my current map which was diff. from the one i posted earlier and 2 logs.
So now i have a new problem...boost is going as high as 20psi!? wtf? it should be runing off the wastegate spring pressure. i check the hose and looked fine. so wat could be causing this?
http://home.comcast.net/~emp00/supra2.rar

[empera]

question guys, is the boost solenoid off the truboost the same as the boost solenoid used with the aem....also could i use a diff. boost solenoid with the truboost? please let me know if any of u do know.

[Terry steward]

Hi guys,i had opted for the aem controlling my boost,as the hks evc vi i have fitted at the moment,just seems so bloody complicated,as yet its not set up yet,because ive encountered a problem,ryan from 2bar tuning here in the uk,came over a couple of weeks back,to fit my aem ems,the innovate wideband,and the solenoid etc,he was going to get the car running ok and safely,on the map sensor and ait,then i was to drive to the rolling rd,and map it at high boost and finalise everything,i was looking forward to around 400/450 bhp.

anyway,he had an awful lot of trouble,he got it started easily enough,but it was running pig rich at idle,and when he tried to lean it out,even a tiny bit,it just ran very lumpy,and even cut out,he then tried all sorts to get it running,we tried going back to maf,he checked the wiring etc,and it seemed fine,he then finally tested the injectors,and lo and behold,someone had fitted high impedance,the car has never seemed right,even with the standard ecu.

we checked the mkiiisupranet,and found a mod,which allows high imp to be used,basically,cutting all the 4 wires to the resistor pack,and soldering them all together,he then tried again,running back to map sensor,still wouldnt do the trick,finally back to maf,and crap !!!,we then ran out of time and daylight.

i now have low imp injectors fitted,and have re attached the four wires to the resistor pack,and i am awaiting ryan to have another try,coz although it starts,it wont pull away,even if steadily,it just tries to die !!!,another thing i heard,is that the ait sensor should be between the air filter and the turbo ??,whereas mine has been mounted into my hks 3000 pipe,just b4 the throttle body inlet.im not sure where the map sensor has been tapped into,but i assume the other end of the throttle body.i know there are a number of people well versed in the fitting of the aem on here,just wondering if any of you guys have some advice for me,to pass on to ryan,as this car has been pissing me off for a long time now,and i dont think ryan has done the mkiii install,only the mkiv supras,with gr8 success, cheers guys.

[empera]

Hi guys,i had opted for the aem controlling my boost,as the hks evc vi i have fitted at the moment,just seems so bloody complicated,as yet its not set up yet,because ive encountered a problem,ryan from 2bar tuning here in the uk,came over a couple of weeks back,to fit my aem ems,the innovate wideband,and the solenoid etc,he was going to get the car running ok and safely,on the map sensor and ait,then i was to drive to the rolling rd,and map it at high boost and finalise everything,i was looking forward to around 400/450 bhp.

anyway,he had an awful lot of trouble,he got it started easily enough,but it was running pig rich at idle,and when he tried to lean it out,even a tiny bit,it just ran very lumpy,and even cut out,he then tried all sorts to get it running,we tried going back to maf,he checked the wiring etc,and it seemed fine,he then finally tested the injectors,and lo and behold,someone had fitted high impedance,the car has never seemed right,even with the standard ecu.

we checked the mkiiisupranet,and found a mod,which allows high imp to be used,basically,cutting all the 4 wires to the resistor pack,and soldering them all together,he then tried again,running back to map sensor,still wouldnt do the trick,finally back to maf,and crap !!!,we then ran out of time and daylight.

i now have low imp injectors fitted,and have re attached the four wires to the resistor pack,and i am awaiting ryan to have another try,coz although it starts,it wont pull away,even if steadily,it just tries to die !!!,another thing i heard,is that the ait sensor should be between the air filter and the turbo ??,whereas mine has been mounted into my hks 3000 pipe,just b4 the throttle body inlet.im not sure where the map sensor has been tapped into,but i assume the other end of the throttle body.i know there are a number of people well versed in the fitting of the aem on here,just wondering if any of you guys have some advice for me,to pass on to ryan,as this car has been pissing me off for a long time now,and i dont think ryan has done the mkiii install,only the mkiv supras,with gr8 success, cheers guys.

kinda sounds like a similar problem that i had...your ait sensor is fine. Make sure ALL of your sensors are hooked up and working properly, including you coolant temp sensor. If the ecu reads the wrong temps and readings it might dump a bunch of fuel to compensate.

[Terry steward]

kinda sounds like a similar problem that i had...your ait sensor is fine. Make sure ALL of your sensors are hooked up and working properly, including you coolant temp sensor. If the ecu reads the wrong temps and readings it might dump a bunch of fuel to compensate.

Cheers for that,we think the problem was down to the 550,s, being high impedance,and that a re map now there are low impedance injectors,should make all the difference,but with all the aggro i have had in the last year with this car,it has made me very skeptical,i cant believe thats going to be that,and im gonna finally have the elusive 400/450 bhp,done and dusted !!!

[Malloy]

empera: Who is the boss AEM tuner round these parts?

[empera]

i'd look up the guys at RT tuning..they're good people

[Malloy]

Cool thanks for the tip man.

[empera]

do u have the aem installed yet? lmk if u need any help with it.

[Malloy]

Not yet...getting it soon tho!

[dslocal]

I need some help with my AEM.
the problem I am having is that for some reason I can't get the tps to configure itself. When I have my laptop hooked up to the aem it says the throttle is at 100% all of the time and for some reason even when I go to configure it (like it goes through the thing, make sure pedal is all the way up, push ok. make sure its fully depressed, push ok)
Even after I do that it will still say that it is 100% open?
Could my tps be bad? I am stumped. I was supposed to bring this to tune it on thursday so I would like to solve this.
Thanks

[empera]

check the TPS wiring, if something isnt connected properly it could read 100%
when mine is disconnect it will read that.

[dslocal]

ok thanks for the quick response, but what would cause it to read fine before and not now?
I'll double check its pluged in though

[empera]

question for the gurus car is having a tough time starting, it starts after a few tries...its really rough, i set the timing, i sync'd it and still having some issues...sometimes it'll start right up other times it'll crank and make wierd noises....any ideas?

[dslocal]

Ok I am having some problems with bad breakup all over the place in any kind of positive boost from 1 pound to 12 pounds which is wastegate.
I was first blaming it on spark blowout but now it seems more like it could be something else. I am going to try replacing my coils with some higher output ones and see if that helps and possibly even try a HKS DLI? Any input on that?
Just kinda looking for a place to start, I am seeing an even 11.3 to 11.6 for my afr while this is happening to. Kinda stumped

[Funkycheeze]

Which ignitor are you using? the AEM box has a bad time with the stock 1J/2J ignitors, and the 7M ignitor.

[dslocal]

well it is the stock ignitor(1jz). Which one would you recommend switching it out for? I also realized that when this was happening it was going quite rich like 9.6 to 10.0 and if I stay in it it will keep these afr's but if I back out to say like 90 percent my afr jumps back up to 11.3-11.6 any ideas? I am still learning here.
Thanks

[Funkycheeze]

The AEM CDI system operating in waste spark mode and connected to all 6 coils, or the 2JZ-GE igniter with a set of GE waste fire coils would work.

Normally, however, the O2 readings tend to lean out on misfires due to the unburned air in the exhaust. You sure the fuel maps are at least somewhat close?

[empera]

im having a tough time with really rich decel. Where exactly should my afr's be on decel? atm im around 10....

[TheNewRed]

im having a tough time with really rich decel. Where exactly should my afr's be on decel? atm im around 10....

Decel's should be pretty lean, the computer should be just about shutting the injectors off.

[bfr1992t]

well it is the stock ignitor(1jz). Which one would you recommend switching it out for? I also realized that when this was happening it was going quite rich like 9.6 to 10.0 and if I stay in it it will keep these afr's but if I back out to say like 90 percent my afr jumps back up to 11.3-11.6 any ideas? I am still learning here.
Thanks

It's misfiring because it's too rich. If you're running a full boost comp map try taking 5-10% out of those columns on your fuel map. Your throttle angle correction table might be off too.

[bfr1992t]

Decel's should be pretty lean, the computer should be just about shutting the injectors off.

DFCO works only if configured properly (defaults are not - may not activate at all and decays quickly when it does). If the cells he is in during decel are rich then it will run rich when DFCO is not active.

[empera]

where is the DFCO settings?

[bfr1992t]

Fuel / Decel Fuel / Options and Fuel / Decel Fuel / Advanced Decel / Options

DFCO = Decel Fuel Cut Off - it's a parameter 0 for disabled 1 for enabled

[empera]

lol why cant i seem to find it. is this on v1.19?
maybe im just retarded.

[IJ.]

Decell cut caused huge issues here when I enabled it in my MoTeC, thin race style rings flutter badly on decell when there's 0 fuel burn, I used 1qt of Oil in 600Km's.

Just something to keep in mind.

[empera]

hmmm im just getting so much smoke on decal its ridiculous, afrs are around 10, any ideas IJ
?

[IJ.]

I just ran mine way lean on decell vacuum, about 18:1 and it was fine.

Have a look where your engine runs at idle on the fuel map then set everything below that lean and see how it behaves.

You need a little fuel in there to burn off any oil and crap that's sucked in when you back off or you get a big ass puff of smoke when you open the throttle.

[empera]

hmmm yea i'll try to adjust the map accordingly, thanks ian, will let u know how that goes

[IJ.]

Does the AEM do closed loop down there?

If so set it's AIM table to say 16:1 or Lambda 1.09 and see how it goes.
(sorry for being vague but I don't really speak AEM)

[bfr1992t]

lol why cant i seem to find it. is this on v1.19?
maybe im just retarded.

Yes 1.19 in AEM Pro, not Tuner.

By parameter I meant in the parameter window 'DFCO' would give you a result of 0 or 1.

See attached screenshot.

Fuel Off Above RPM - pick an RPM

Fuel Off Below Load - this should be 5-10kpa below where your engine idles at full operating temp but above the increased vacuum from a closed throttle decel condition (car rolling in gear 2500-3000rpms throttle closed)

Fuel Off Below TPS - pick a TPS position slightly above closed.

Fuel Off Coolant Min - 32F is probably on the low side. Didn't realize mine was that low, but it's never exhibited a problem.

To disable DFCO just set one of the parameters such that the condition will never be met - ie RPM to 8000.

Also as IJ suggested, I have my bottom (lowest) load row set to achieve approx 18:1 AFR above 1500rpm. That load breakpoint is below what my car idles at. The second row load breakpoint matches idle. That said, keep the 9 cells around idle at your desired idle afr so that if load does drop at idle (increase in vacuum) it doesn't stall.

[empera]

u know wat it was my parameters were locked and didnt have the DFCO listed. hehe

thanks man!

[survyor2]

In the past I did my own tuning using a SAFC2 and AVC-R boost controller. Very easy to learn and use.

Got my AEM EMS 30-1130 a few weeks ago. Tuned at HPlogic for 18psi pump gas. I was still using the AVC-R for boost.

Last week AVC-R that I've been running for 10 years dies. Now I want AEM EMS to controll my boost.

I installed the MAC solenoid valve (exactly the same as the AEM solenoid) and ran the vacuum lines and verified they are correct. MAC valve is wired to PW2 (avail boost control) and HS#2 (avail +12v switched, 4.5A max). Correct so far?

All I want to do is set the boost exactly what the AVC-R was set at, 18psi. I read the follow link on tuning for boost:

http://forum.aempower.com/forum/index.php/topic,994.0.html

Now I'm lost. Can anyone help me through this. This link confuses the crap out of me.

Here are the options I have currently set up:

Boost W/G Output = check
Boost from Load = check
Boost W/G Invert = check
Boost W/G Frequency = 31Hz
Boost/Idle PW TPS = 10%
Boost Duty Maximum = 99.61%
Boost Duty Minimum = 0.00%
Fuel Cut Load = 343.35 kPa

http://i52.photobucket.com/albums/g28/survyor2/BC-1.gif

[Halsupramk3]

be sure the hs#2 is set to turn on at 1000 rpm or whatever, and the other parameters are set so it will get power. you can just wire it to any switched 12v and not to the aem.

you can send me your map and i will set up the numbers. too much to post. also set map filter to 6 teeth. it is in setup/sensors/manifold presure sensor/ options map sensor. this will stabalize the map sensor reading so the selanoid can be reliably controlled.

my email is halsupramk3@bellsouth.net

i will send you my phone number so we can get this done correctly.

[survyor2]

be sure the hs#2 is set to turn on at 1000 rpm or whatever, and the other parameters are set so it will get power. you can just wire it to any switched 12v and not to the aem.

you can send me your map and i will set up the numbers. too much to post. also set map filter to 6 teeth. it is in setup/sensors/manifold presure sensor/ options map sensor. this will stabalize the map sensor reading so the selanoid can be reliably controlled.

my email is halsupamk3@bellsouth.net

i will send you my phone number so we can get this done correctly.

Hal,

Thanks for the respond. I sent you an email. Let me know if you got it. I had trouble with the email address you gave me. Thanks, Dennis

[Halsupramk3]

i corrected the email address.
I believe the HS#2 are +12v sources that you turn on in the options/ configure outputs hs#2. it would provide 12v to the selanoid. DO not run 12v into this pin. at least i think that is correct as i have not used hs pins yet. the LS are switched ground that you would use to trip a relay etc with a ground connection from this pin in the aem.

you can not tune the boost selanoid with the P+I option on. you have to have info for what wg duty % provides what boost and calc the numbers to input there.

please email/provide what engine mods you have. what injectors, size turbo, what wastegate type and size, oem throttle body? , CR etc.

i highly suggest you use boost comp instead of a load map. boost comp is easy and works great. do you have any logs to send me?

[survyor2]

I'm back with another AEM EMS question. I took care of all my old issues and things are pretty good. Now, I have an idle issue. Every 3-4 days my idle will decide to change. I set the idle curve were I want it. All its good for awhile. Then all of a sudden the idle will jump up to 1500rpm. So I use the idle curve to bring it back down. All is good for 3-4 more days then it decides to switch back and now my idle is so low it won't run. So I adjust the idle back up and all is good for 3-4 more days. Repeat...

Ideas? Bad IAC?

Dennis

[empera]

im still having an issue getting the car to start up constantly...
sometimes it will turn over quickly and then stumble and other times it cranks slow...
im thinking it might something with the timing? i synced the timing. this is kinda upsetting. anyone have ideas?

[bfr1992t]

The AEM EMS sometimes takes a bit to "boot up". Most found it's best to key on, wait for the fuel pump prime, then try to start.

After that check your crank inject tables, maybe add or remove fuel and timing at cranking.

[empera]

yea i do that all the time, turn key, wait and crank...still get that stumble and crap

[empera]

ok problem solve using a 0 gauge cable helped out and did some tweaks on the aem.


another question would be...my coolant temperature reading isnt stable...it kinda spikes up really quick. Is there a way to get the reading more stable? my fan doesnt like this heh.

[sethron71]

Hey guys a few questions.

Basically I gathered as many maps as I could prior to getting my AEM and compiled a personal map after tons and tons and tons of reading and research.

So here are the questions:
How do I set the timing table?
I have heard to make runs on the dyno and continue adding timing in the peak torque region until you stop gaining power, is this a good way, and then how do you set the rest of the table? Do I just keep adding timing till I see knock and then back it off a touch?
Along with this I have attached a log file. If someone can please look and see if the knock spikes I get are real knock or maybe exhaust noise or something? They are very temperary and only to as high as 2.2volts but I don't know what real knock looks like lol.

Next is start up. The car seems to start up and stumble a bit upon start up. AF is enriched but until I blip the throttle it never comes up to the desired warn-up RPM. Any ideas?

Thanks in advance!
Seth