I posted at beginning of September (CEL on and no code) - still did not find my problem...
Resume:
- when engine get warm, idle drops (normal) but CEL turn on = code 34: MAF sensor; I had change the MAF sensor but still the problem is there.
- timing is good;
- compression is good;
- fuel pressure is good;
- TPS is good (resistance);
- ECU is good (I tried another one from friend);
- EGR is good (and cleaned now!);
- injectors are good;
- no air leak;
I'm running out of possibility...
I'm left with the ISC valve. I tested the resistance: ok
I removed it and try it on battery : ok, it operates normally
But: while the ISC is on, I unplugged the wire, and I get reading between 0 and 1V at idle and goes up to only 2V when I open throttle (5000RPM) . I'm surprised to get only 2V??? what should be the reading? I tried to blow air in by the hose: the valve is closed, it does not open for sure. I got a second ISC, had one in place, and had the second one plugged to the wire and in my hand; I was expecting to see it operates (open/close), but nothing happenned; even when I open throttle, the valve does not move at all.
Engine, cold or warm, does not burn the gas good - it miss sometimes and smell very bad. I removed the ISC - too much fresh air I agree - but then the engine run perfectly and burn its gas good (controlling manually the air intake with a sheet of metal).
I know I get the code 34 but testing MAF and changing it, it's good.
ISC does not operate, only get 0 to 2V: is this normal??
thanks,
Resume:
- when engine get warm, idle drops (normal) but CEL turn on = code 34: MAF sensor; I had change the MAF sensor but still the problem is there.
- timing is good;
- compression is good;
- fuel pressure is good;
- TPS is good (resistance);
- ECU is good (I tried another one from friend);
- EGR is good (and cleaned now!);
- injectors are good;
- no air leak;
I'm running out of possibility...
I'm left with the ISC valve. I tested the resistance: ok
I removed it and try it on battery : ok, it operates normally
But: while the ISC is on, I unplugged the wire, and I get reading between 0 and 1V at idle and goes up to only 2V when I open throttle (5000RPM) . I'm surprised to get only 2V??? what should be the reading? I tried to blow air in by the hose: the valve is closed, it does not open for sure. I got a second ISC, had one in place, and had the second one plugged to the wire and in my hand; I was expecting to see it operates (open/close), but nothing happenned; even when I open throttle, the valve does not move at all.
Engine, cold or warm, does not burn the gas good - it miss sometimes and smell very bad. I removed the ISC - too much fresh air I agree - but then the engine run perfectly and burn its gas good (controlling manually the air intake with a sheet of metal).
I know I get the code 34 but testing MAF and changing it, it's good.
ISC does not operate, only get 0 to 2V: is this normal??
thanks,
|Sidekick 92, 4 dr, 5sp, 16v, over 200,000KM, Canada