Question about 2003 Ford Expedition
Have you changed the spark plugs. I recently changed mine in an expedition and tried using the E3 plugs which were about $56. I don't see any mpg difference but I can tell a difference in take off or during acceleration. My opinion is go back with a basic OEM or Bosch platinum. Also make sure that the COP is seated good on the plug. I would also recommend using an Di-electric grease to coat the inside of the COP. Hope this helps.
Posted on Aug 27, 2010
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Posted on Jan 02, 2017
Pop the heed, see the air box on the very left? On top of that box is the Ignition Control Unit. Little black square w/ winds about 1/2"
That is the problem. Or Your MAF sensor...
I don't know how to chech the Ignition Control Unit with out the proper tester.
But the MAF is located directly below in side the box.
If you POP off the large hose that comes out of the front of the air box. You can see the MAF, spreay it some contact cleaner for electronics not BREAK CLEANER>>>>>>.
Posted on Jun 18, 2009
check compression, then fuel injector. or vac leak. what kind of scan tool. very few will give live misfire data. you are sure you replaced number 8, drivers side rear?
Posted on Oct 21, 2009
did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
Posted on Feb 28, 2010
Try the ignition module.This is more than likely your problem.It is on the coil pack where the wires connect to.I have had a few of these go on me.This should take care of your problem.Hope this helps.Good luck.
Posted on Mar 24, 2010
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