oh god, please hlep... idle/ start problems
- Thread starter McDewbie
- Start date
It goes from aprox 2k to aprox 1800, but some times it goes slightly higher/lower. Also today to see if it might be an open loop problem I tried unplugging the air flow sensor at the air box and the engine just cut out
You checked the timing with TE1 grounded?
You checked the ISCV is not stuck open (you hear it click after shutdown)?
If above are good, you checked the TPS? Unplug it and see if lope is impacted.
Not to mention that the idle speed is controlled by the ECU, so the ISCV would be adjusted to maintain the target value.
You checked the ISCV is not stuck open (you hear it click after shutdown)?
If above are good, you checked the TPS? Unplug it and see if lope is impacted.
MK3Supra17;1840803 said:
Not to mention that the idle speed is controlled by the ECU, so the ISCV would be adjusted to maintain the target value.
I dont understand how you check timing if the engine doesnt get to the desired rpm to time it? also no matter what i shove into the diagnosis box nothing ever seems to happen (have the same problem with my 88 pickup), is there some trick to doing it? and I had checked the ISCV and it did click, but as i think about it i dont remember it clicking the last time i started it, so il go check again later today. I have also bought a o2 sensor (was 10$, couldnt say no) to see if that does anything, thinking it might be sending the wrong numbers. I will also check the TPS today. and does anyone know how the iscv works?
If TE1 is grounded, and the throttle is closed (based on IDL signal from TPS) and the car is not moving (speed=0) then timing will be set to 10 deg BTDC. Measure it with your timing gun, even though the idle is fast and lumpy it should hold at 10 BTDC if the above conditions are true.
The ISCV is a stepper motor. It is commanded full open at shutdown, and gets closed down after start to hit the target idle speed.
The ISCV is a stepper motor. It is commanded full open at shutdown, and gets closed down after start to hit the target idle speed.
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In diag mode the MIL will show code 51 when the gas pedal is slightly pressed and no codes when released. If it does the TPS is set close enough. Never time the engine without first doing this test or at least checking for codes.
Can't remember were or from who I got this quote, I think from JJ.
Can't remember were or from who I got this quote, I think from JJ.
well i'd checked for codes and there are none so il do the gas pedal thing as well as check all the other stuff ive been saying i would ( schooling and work makes it hard to get around to my car)
so i checked the iacv and it doesnt click... but i could swear it had before i tore it down for the 2nd time... anywho i gotta try to find one for less than 700$ see if it does anything, would it affect the difficulty to start