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Thanks for the previous inputs. I purchased a Sears timing gun and was wondering what degree to set the timing to as 10.5 is for the stock spec. I have the Lexus/550 mod with an electronic boost controller. I usually boost to 12 PSI. Is there a range anyone can give me as far as degrees...

Quote: 2- Air pockets in the coolant system 3- Clutch fan cooling fan 4- Vaccum leaks these are not 7m problems. those are maintanence problems. in other words, lazy, unskilled, incompetant owners! dont blame the car for problems that the owner has caused/allowed to develop...

It seems like it all depends on the situation: if you just did a complete rebuild of your motor versus if you changed some gaskets and did a BHG job and always used regular oil (my case - 121,000 miles worth) and so on. This is what I am going to do: 1- Use Toyota brand oil filters (or...

Thanks for the replies. I had the rear main seal replaced and the gaskets when I had the BHG fixed. So I should be OK to switch over. Also, I just switched over from the green coolant to the red last week. I am upgrading the fluids -- a cheap "mod". :icon_wink

I have an 87 Turbo and had a very similar situation. It ended up being boost leak (an intercooler pipe was loose from the increase in pressure from 7 PSI to 13 PSI). Check the lines to and from your intercooler and also the turbo. You may also be running lean which is a different problem...

My car always had regular (non synthetic) oil and I was wondering if just draining the oil, replacing the filter and adding a synthetic oil like Mobil-1 was OK? Is there anything I need to do like a motor flush? I always thought it was OK to switch over but some say once you have regular oil...

OK seems easy. I think you have to short out something in the diagnostic block - some people use a paperclip for this step in setting the timing. I called Toyota - they want $370 :eek3: for a new ISC. They said you have to buy the whole thing so if your ISC guts are no good... too bad...

I think this is a common problem. The TSRM says it is ignition timing. I guess we don't worry about it if your timing is OK.

Timing gun question: Any suggestions as to where to buy it or what manufacturer? I don't have one and never used one. I need the experience.

So then I should not worry about this one then?

I checked the terminals on the ISC and they are within spec (10 to 30 Ohms as specified in the TSRM). I saw around 22 to 23 Ohms for the resistance for the two checks. I didn't take the ISC completely apart. But what another member said about "giving it a squirt" so the car does not stall...

"Bad/blocked stepper motor for the ICS" What is the ICS stand for please? I forget... Thanks

No problem - I welcome it! I just wanted people to respond to the right person that's all...(Not to mix up the answers)... :)

(original author) I have a brand new AFM from SupraSport. The electronics are the originals; I have no error codes. My vaccum: when I first start the car -- around 16.5 PSI When car warms up and is on for a while -- around 18.5 PSI

Please see other thread "Stalling after high RPMs" - it is related - thanks Mods: Lexus AFM 550 cc injectors HKS SSQV BOV racing intercooler with custom pipes suprasport turbo elbow, 3 inch downpipe, 3 inch exhaust, tanabe cat back 1 super flow CAT (Stock Turbo) SAFC HKS EVC...

The thing is - the BOV is being recirculated. It isn't venting to the atmosphere. I forgot I also have the Walbro fuel pump in the list of mods. The missing at idle and stalling after high acceleration was occurring in my car for the past 3 years. These problems were there before all my...

Mods: Lexus AFM 550 cc injectors HKS SSQV BOV racing intercooler with custom pipes suprasport turbo elbow, 3 inch downpipe, 3 inch exhaust, tanabe cat back 1 super flow CAT (Stock Turbo) SAFC HKS EVC electronic boost controller Zeitronix Wideband O2 sensor (just the lambda and the...

I have a small backfire after deceleration, when shifting between gears and going from a higher RPM to a lower RPM. Anything I can check or a suggestion? Thanks

1- Head gasket :evil: 2- Air pockets in the coolant system :nuts: 3- Clutch fan cooling fan 4- Vaccum leaks 5- Intercooler size/efficiency 6- Missing at idle

Anyone know the cause of a 5-speed 7M-GTE stalling after hitting higher RPMs? For example, say a half hour drive on the highway and then winding down the RPMs when approaching a stop sign or stop light? It does not happen all the time but seems to happen the most when going from a high RPM...