Question about 2003 Ford Expedition
You need to install new spark plugs every 70,000 miles
If that was done, then you have a worn out TPS Sensor,
and possibly a bad COP Igniton Coil as well
You will get 1 or 2 coils a year go bad
If it is just on hills, when you have a high vacuum load,
then check out the EGR Valve
Posted on Mar 28, 2011
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Posted on Jan 02, 2017
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