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spfi acts like carb w/bad accelerator pump
Posted 22 November 2003 - 09:07 PM
i read once on the board about a solenoid that will stick open, something to do with air introduction.
it has almost 200,000 miles. we have that little $100 for a spare, if that may be it. but could it be something on the throttle body? the amount of "vacuum leak" seems more than what that little component will allow.
and also, could it be the brake booster. you can tell it works when the motor runs, and when you step on the brake while idling, it will make popping noise or want to stall out.
Posted 22 November 2003 - 09:32 PM
Posted 23 November 2003 - 08:00 AM
Sitting with no hood on it, could've cause some corrosion on the wiring connectors, giving false signals to the ECU.
Could be the coolant temp sensor is bad, or faulty. ECU has to know the temp of the engine to give proper pulse timing to the injector(s).
Would a bad O2 sensor cause a lean condition? Where as the O2 sensor is telling the ECU that the engine is running rich, causing it to lean-out the engine.
Lean air/fuel mixture will cause backfires thru the intake, so can improper ignition timing.
Have you checked for vacuum leaks, everywhere?
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