Question about 2002 Ford Expedition
Replace all the ignition coils, this vehicle is known for ignition coil failure. Typical symtoms include: jerks when accellerating, jerks on light-heavy loads, misfire, stalls, check engine light. These coils usually last up to 80k miles.
Posted on May 10, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
Throttle Body Cleaning on vehicles without electronic throttle control (most 2003 and down)
You can in most cases repair this slow speed stall or unstable idle by cleaning the engine throttle valve and the idle speed control valve using a product called CRC Spray Throttle valve cleaner. Spray the cleaner into the air intake of the engine with the hose removed from the throttle body, the engine will try to stall so hold up the idle speed manually. Once you have used up about 1/2 can of the cleaner stall the engine out while spraying and turn the key off, disconnect the negative battery cable for 5 minutes and then reconnect and drive the car for a about 25 miles of varied driving modes. If this doesn't cure the problem you may need the fuel injectors professionally cleaned by the dealer service dept.
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