Help Please
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Help Please
I have a 2004 ford expedition and went to advance auto today to get the codes read. The codes stated "Lean". Replaced the air filter but my truck reves a lot when I am at a stop light. I am scared because I feel as though it is getting ready to cut off on me. Please help!!!!
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From: Greenwood Indiana
I have a 2004 ford expedition and went to advance auto today to get the codes read. The codes stated "Lean". Replaced the air filter but my truck reves a lot when I am at a stop light. I am scared because I feel as though it is getting ready to cut off on me. Please help!!!!
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I did not get the specific code #. What does TPS or IAC stand for? Also what does MAF stand for? ALso today at the stop light, my truck cut off on me. It reved a lot and then cut off while the battery lgiht flashed. Do you know what this means?
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TPS - Throttle Position Sensor
IAC - Idle Air Control (valve)
MAF - Mass Air Flow (sensor)
PVC - Positive Crankcase Ventilation (valve)
The lean condition is telling you that have a vacuum leak. A vacuum leak can also cause reving and stalling, as can the IAC. I would first check the PVC hose at the top rear of the engine for cracks. This is a well know vacuum leak point.
IAC - Idle Air Control (valve)
MAF - Mass Air Flow (sensor)
PVC - Positive Crankcase Ventilation (valve)
The lean condition is telling you that have a vacuum leak. A vacuum leak can also cause reving and stalling, as can the IAC. I would first check the PVC hose at the top rear of the engine for cracks. This is a well know vacuum leak point.
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Theoretically, it sounds like you need to Clean and/or replace the IAC. Stalling at stoplights, this is the likely culprit, but you should do as others have stated and get the EXACT code pulled. Also, change the Fuel Filter, if it hasn't been done in about 15,000 miles. Don't let the guys at Advance Troubleshoot it for you. They'll just throw parts at it or tell you to buy a $10.00 can of SeaFoam again and again.
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