A Bad COP? Or something else?
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Junior User
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A Bad COP? Or something else?
I recently washed down my V10 (with water). And what do ya know!! I ended up with a miss-fire. I pulled all coil boots , inspected, cleaned, lubed and reinstalled. It's better at idle, but under a load at hwy speed it miss-fires bad! Does it sound like a bad COP to those that have experienced the same??? No CEL. 95K miles Ex, new plugs and boots at 85K. Original coils. No more washing the engine for me.
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Joined: Jul 2002
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From: Long Island USA
Sounds like a COP with a crack or some other way the water got into it.
You won't get a CEL, have it scanned and you MIGHT have a pending misfire code which will tell you which cylinder is misfiring so you don't go hunting for the bad one.
Or, buy one brand-new COP and put it in #1 cylinder. If that doesn't fix it, move it to #2, and so on and so on. Eventually, it will stop
You won't get a CEL, have it scanned and you MIGHT have a pending misfire code which will tell you which cylinder is misfiring so you don't go hunting for the bad one.
Or, buy one brand-new COP and put it in #1 cylinder. If that doesn't fix it, move it to #2, and so on and so on. Eventually, it will stop
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Junior User
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Sounds good. I purchased all new coils. My miss was slight at idle and under a load and non existent at higher RPM's. My Motorcraft platinum plugs are 15K miles old. Should I replace them due to the possible slight fowling because of the miss?
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