Doesn't turn over without gassing, flashing ECC
08-24-2006, 02:53 PM
#11
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Originally Posted by willwren
I don't suspect fuel pressure. If it were bad enough to not start, he'd have fueling issues at WOT.
I suspect when he presses the gas pedal, he'* allowing AIR into the plenum. This would indicate that his IAC is not working properly or is crudded up/dirty, blocking the passage so the IAC cannot regulate the proper amount of air for idle with the throttle plate closed.
Remove the throttle body and clean it and the MAF sensor using the procedure in Techinfo.
(fuel is not added by the pedal being pressed. Fuel is added by the PCM based on the amount of air entering the TB and the feedback from the O2 sensor)
I suspect when he presses the gas pedal, he'* allowing AIR into the plenum. This would indicate that his IAC is not working properly or is crudded up/dirty, blocking the passage so the IAC cannot regulate the proper amount of air for idle with the throttle plate closed.
Remove the throttle body and clean it and the MAF sensor using the procedure in Techinfo.
(fuel is not added by the pedal being pressed. Fuel is added by the PCM based on the amount of air entering the TB and the feedback from the O2 sensor)
Clear the code by disconnecting the battery while you clean your terminals and cables, clean the TB and MAF sensor as I suggested, and then lets see what you have.
08-24-2006, 04:58 PM
#12
DINOSAURUS BOOSTUS
Expert Gearhead
And me..myself..
Check fuel pressure..
I have nearly the same starting issue on a vehicle currently.. leakdown is the reason why it doesn't start.
Your'* could be similar..but not necessarily.
Check fuel pressure..
I have nearly the same starting issue on a vehicle currently.. leakdown is the reason why it doesn't start.
Your'* could be similar..but not necessarily.
08-24-2006, 05:25 PM
#13
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A quick test to see if leakdown is an issue at startup is to turn the key on, wait two seconds, and start. If it'* harder to start at 5 seconds than at 2 seconds, leakdown may be an issue.
If it'* harder to start immediately than with the 2 second prime delay, the FP may be weak.
Regardless of the scenario, a fuel pressure test would be in order to be sure.
The ECC code must be scanned by someone with a Tech2 (dealer).
If it'* harder to start immediately than with the 2 second prime delay, the FP may be weak.
Regardless of the scenario, a fuel pressure test would be in order to be sure.
The ECC code must be scanned by someone with a Tech2 (dealer).
08-24-2006, 08:01 PM
#14
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Thanks for everything guys, I mean it.
I cleaned the MAF sensor tonight, but ran out of daylight to do the rest of the work on the throttle body. Tomorrow after work I need to pick up some castrol superclean and get going on that. Didn't seem to make a difference, and the check engine light is back on. I will keep trying the suggestions you guys already posted, but there'* not enough hours in a day sometimes. My dad suggested that the PCV valve may need to be replaced. Or a fuel pump resistor. He has some knowledge of cars, but not nearly as much as the folks here so I doubt he'* right as someone would have suggested it already. Thanks again guys, I'll keep you posted.
I cleaned the MAF sensor tonight, but ran out of daylight to do the rest of the work on the throttle body. Tomorrow after work I need to pick up some castrol superclean and get going on that. Didn't seem to make a difference, and the check engine light is back on. I will keep trying the suggestions you guys already posted, but there'* not enough hours in a day sometimes. My dad suggested that the PCV valve may need to be replaced. Or a fuel pump resistor. He has some knowledge of cars, but not nearly as much as the folks here so I doubt he'* right as someone would have suggested it already. Thanks again guys, I'll keep you posted.
08-24-2006, 10:53 PM
#15
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There is no fuel pump resistor, and your PCV will not affect you on starts unless it'* completely clogged.
Keep us posted on the results so we can all learn from it.
Keep us posted on the results so we can all learn from it.
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