my car stalls when the engine warms up,why?

Asked by Oct 24, 2012 at 03:16 AM about the 2003 Ford Explorer XLT V8 4WD

Question type: Maintenance & Repair

when its cold.,it stays on but as soon as it warms up it cant stay idle any more just shuts off.

1 Answer

1,225

vacuum leaks. The key is, idles OK when cold, stalls when warm. Idle is directly related to vacuum. Double check all vacuum lines. Tighten all loose bolts, especially intake manifold, throttle body, etc. I use a squirt bottle with water, spray seams and hoses, etc when idling. When you hit the leak, the water temporarily seals it; engine perks up, smooths out for a few seconds. Cheap and easy troubleshooting method.

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