Question about 1998 Ford Expedition
I would still remember, that all ford COP Coils have issues,from 1998 thru today
The Coolant Temp Sensor, should put it into closed loop, after it warms up---then the O2 Sensors can do their thing. That's one item
O2 Sensors slow to swing--maybe,need to test
Converter partially blocked-a bit of a stretch, but don't rule out.
I would buy one new coil, and walk it down from cyl to cyl,tough on that engine,but I put my money there
Posted on Oct 02, 2010
My expedition was doing the same I also cleaned the maf sensor I had to end up changing the maf to a new one and fixed the problem.
Posted on Nov 02, 2010
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Posted on Jan 02, 2017
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