i made a post awhile back ago about after installing my walbro i noticed problems with revving when warm(afpr set at 32psi without vacline). last night i took out the tank again and checked everything and even made new wires. put it back...drove around same problem. when revving it up after a 20min drive it would bog at times. like studder then it will go away if i rev it a couple times. but all the time when i hold idle at about 2500 rpm or less the car has a slight miss. so i redid my cps wires again with better crimps same thing...any ideas? thank you
missing problem
- Thread starter 808mkiiisupra
- Start date
Check for error codes first.
Did you check your timing also?
BTW I have my afpr set at 40psi without the vacline on. Maybe you're running a bit lean?
(edit: I have the lexus afm/550cc mod. maybe that's why it's different)
Did you check your timing also?
BTW I have my afpr set at 40psi without the vacline on. Maybe you're running a bit lean?
(edit: I have the lexus afm/550cc mod. maybe that's why it's different)
yea no codes...timing is good. i do have the 550s and lexus. but doesnt the tsrm say 33-40 without vac? did u get yours tuned?
How can the tsrm provide info for 550cc injector fuel pressure ?
I tuned mine on my wideband sensor. 40psi is perfect for me. only a little rich at wot but I tuned it with my safc.
Anyway, stuttering when warm has mostly something to do with sensor signals.
it's time to measure up (and correct) your tps with an ohm meter, do the same with your spark plug wires, check the spark plugs if the rest is not helping.
I have sort of the same problem right now (see some other topic where I post my own findings
) and first things to check are mostly timing, tps, cps, spark plugs and wires, and maybe the ignition coils. they are easily swapped out for another set for a test. you can do thesame for your afm.
as a quick and dirty test, you could pull the plugs from different sensors when the car is bogging. Wait a few seconds to see whether your car starts to run differently. If it does, it means it's missing the signal from the sensor you just pulled. It also means that that sensor is most probably not faulty. So then put it back and try some other.
Things to try are:
AFM
TPS
ECT
CSI
Tps is on your throttle body, afm electronics on its housing near the air filter and the rest are the brown and green sensors near your water thermostat housing.
Hope this helps
I tuned mine on my wideband sensor. 40psi is perfect for me. only a little rich at wot but I tuned it with my safc.
Anyway, stuttering when warm has mostly something to do with sensor signals.
it's time to measure up (and correct) your tps with an ohm meter, do the same with your spark plug wires, check the spark plugs if the rest is not helping.
I have sort of the same problem right now (see some other topic where I post my own findings
) and first things to check are mostly timing, tps, cps, spark plugs and wires, and maybe the ignition coils. they are easily swapped out for another set for a test. you can do thesame for your afm.as a quick and dirty test, you could pull the plugs from different sensors when the car is bogging. Wait a few seconds to see whether your car starts to run differently. If it does, it means it's missing the signal from the sensor you just pulled. It also means that that sensor is most probably not faulty. So then put it back and try some other.
Things to try are:
AFM
TPS
ECT
CSI
Tps is on your throttle body, afm electronics on its housing near the air filter and the rest are the brown and green sensors near your water thermostat housing.
Hope this helps
hey thevork thanks for your reply. well im going to have to bump up the fuel pressure first. then im going to test some signals...what gap are u using on ur plugs? thanks again
ohok im going to check my autolites tomorrow. another thing...my isc is probably no good im guessing. i took off the harness and started it up again when hot and the idle doesnt go up and down. it does wen i do the same test when cold. is that a problem? but i dont think it will effect my missing...btw i upped the psi to about 40ish...
How much boost are the two of you running each? I'm guessing thevork is making more power and boost, and 808 is just getting everything dialed in. Think you should go lower on you fuel pressure? Start around 33 psi?
yea well idk how much im making...im just dialing it in with the walbro now. i got the 60-1 ct26 and everytihng else. maybe i might back it down again but idk only bogs when i tap the gas after a pull....