2002 expedition 5.4 liter check engine light is on. registering trouble code p0358. what is causing this trouble.

Asked by Jan 12, 2014 at 01:24 PM about the 2002 Ford Expedition XLT 4WD

Question type: Maintenance & Repair

I have changed all 8 spark plugs, all 8 coil on plugs, and still getting the same trouble
code. What else can i check? i still have a slight miss in my engine.

3 Answers

124,005

http://www.obd-codes.com/p0358 -- check this out. You might find some of the info helpful

3 people found this helpful.
275

P0358 designates a short or disconnect on the #8 cylinder firing (http://www.obd-codes.com). Those wires are somewhat fragile and that one might not be making good connection - did you use dielectric grease when you reconnected the plug to the coil? You might try to wiggle the wire to the coil to see if that solves the problem - if so, then the wiring harness or the coil itself may be the issue. Good luck!

1 people found this helpful.
28,325

Did you clear the codes and drive it a while before the "Check Engine" light came back on? It takes a long time to clear a code by just driving it. If you can access one, use a scan tool that can check PIDs so you can see what #8 cylinder is actually doing. If the Spark Plug is good (recheck it), the Coil Pack is new (I'd swap it with another coil pack to see if there's a difference) and there's dielectric compound in the boot, check the wiring from that coil pack to the PCM and if that's good you may need a PCM.

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