Question about 1998 Ford Expedition
Hi I'm Peter, I'm not sure what we 've tried everything means. You have a code so I have to assume you have a code reader. Depending on which engine you have in your expedition you will either have one or two coil packs. It is a simple procedure to test the coil packs and there is a good video on You tube http://www.youtube.com/watch?v=c1zhgsnyZWw you will of course have to unplug the wires to test the coil pack/s MAKE SURE TO MARK which wire goes where. The packs are held down by 4 little bolts, you will need a ratchet with an extension and a 7mm socket to fit the bolts. Hope this helps and is what you needed.
Posted on Apr 16, 2014
Basically that P301 is a misfire on cylinder #1. That could be a number of things. First and easiest would be a bad plug wire or plug. Next a bad rotor on the distributor or cap. Check those before going on to the Mass air flow sensor, and erg. It could be more technical like a crank shaft issue or timing chain. A good garage can diagnose those but pull the plug and see if it is fouled up and replace it. Cylinder#1 should be in the manual or on the label in the engine compartment.
Posted on Apr 16, 2014
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Posted on Jan 02, 2017
SOURCE: I have a 2000 model
P0174/0171 are bank 1-2 running lean (insufficient fuel) which is related to the misfire codes. When there is a misfire detected, the computer shuts fuel to those cylinders triggering "too lean" codes. These vehicles are known for ignition coil failures. I'd recommend you replace all ignition coils (qty of 8) as they do have a short life span. Replace with another brand (not motorcraft/Ford), such as MSD/Accell/BOSH etc. hopefully this helpd!!
Posted on Oct 06, 2010
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