Question about 2001 Ford Expedition

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Runs rough (like it is chugging) when you drive down the road. it does it always and the check engine light comes on and goes off but the truck still runs rough, the local mechanic plugged it into the computer and couldnt figure out what was wrong.

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You don't have what I would call a mechanic,and what he did was hook a scanner to the diagnostic connector, to check for codes, Nothing else. He diagnosed nothing.
You never left the vehicle with specifics, of your expectations of what you wanted fixed,so to speak.

Bad COP Ignition Coils--- -common on all 1998 thru 2011 fords with cop. At least 1 or 2 fail a year. Some spike the PCM and go into failsafe.shutting the vehicle down

EGR Valves---fail,especially your electronic one

Clean MAF Sensor
Clean Throttle Plate
No Vacuum Leaks--anywhere
Check TPS Voltages
Check
Fuel Pressure

There is more,work on that first

Posted on Oct 03, 2010

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Posted on Jan 02, 2017

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