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Mar 17, 2013 | 11:30 PM

corruptedgunz

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coil packs

ok so I have a 2002 f150 5.4L 4x4 7700 and she was misfiring bad the other day I changed coil pack 1 and 4 because thats what my codes where reading and i changed all of my spark plugs just because the check engine light went away for a little over a day and boy was she running good she had a little hikup with a miss fire but it quickly fixed itself but later now my check engine light is back on and is miss firing again and this time it isnt fixing itself what is going on with my truck? please help

Mar 18, 2013 | 12:22 AM

KhanTyranitar

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Recheck the codes, don't assume that because you replace those parts, that other issues haven't come up. What brand coils did you use? Some aftermarket ones are worse than old worn out factory parts. I will pretty much only use OEM replacement parts on my own ignition systems.

Mar 18, 2013 | 12:32 AM

corruptedgunz

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im going to recheck them after i go to school but i just dont see how i replace those 2 coils and it ran perfectly fine no problums then one lil miss fire that fixed it self the ran fine again then just completly took a **** on me again all within a day of driving

Mar 18, 2013 | 10:19 PM

KhanTyranitar

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If you have a coolant hose leaking, it could leak right onto the coils and short them out. Something to look at.

Mar 18, 2013 | 10:23 PM

corruptedgunz

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Figured it out the code that I read today was p0354 and all I did was wiggle every coil connection now she's running good again thanks for ur help

Mar 19, 2013 | 01:23 PM

Bluegrass 7

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The coils have snap lock connectors.
Be sure you have them seated fully on.
Should not be able to wiggle them when fully seated or you will have trouble again unless the connector is faulty.
Good luck.

Mar 19, 2013 | 01:41 PM

fordcrzymike

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Joined: Apr 2012

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From: Tamaroa, IL

You might want to use some dielectric grease also. The connections maybe a little bit corroded.

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Mar 19, 2013 | 06:42 PM

Bluegrass 7

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Don't be surprised if you have probems again.
You need to take a good look at the situation to see if there is any sensitivity to vibration at some location.
Good luck.