1999 Ford Expedition Q&A

1999 Ford Expedition Question: rough idle And missing out while driving

rough idle missing out,stumbling ,hesitating while driving -
Answer 1
plugs and coils are a good start. labor intensive if you have rear heat Roy -
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when you idle the engine at 1500 rpm the idle goes up and down. when you drive at 1500 rpm the engine stumbles and misses, with a dead spot. i have replaced the following- EGR valve,EGR pressure se...