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Steam cleaned engine and now mis-fire

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Old Feb 20, 2010 | 10:59 PM
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Default Steam cleaned engine and now mis-fire

And I can a here a ticking noise that goes with the mis-fire through the speakers when the stereo on .

My guess is moisture in one of the coil pack connectors. Anyone?

I drove it about 14 miles hoping it would dry up and clear out but it's still there.
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Old Feb 20, 2010 | 11:42 PM
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I agree with you, its probably a bad COP, they hate moisture. You could check all of the plugs and put dielectric grease on them, and try that. Most likely though, one of them is bad. You can wait for the check engine light to come on and have it scanned, then you will know just what COP or which COPs are causing the problem.
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Old Feb 20, 2010 | 11:49 PM
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X2, Prob a COP. If you have an air compressor try lightly blowing the moisture off with light pressure. Water may be sitting down in the hole for the spark plug also causing it to miss fire.
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Old Feb 21, 2010 | 12:12 AM
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I've never had these COP's off, do I need to remove the fuel rail to get them out? Can I just pull the wire
connector to each COP one at a time to isolate the bad one, like pulling the plug wire on a conventional ignition?

Last edited by hotrozz; Feb 21, 2010 at 12:22 AM.
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Old Feb 21, 2010 | 07:30 AM
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Get a spray bottle and fill it with water start your truck and hit each COP with a few sprays of water and if one is messing up due to moisture you will find it.
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Old Feb 21, 2010 | 01:28 PM
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Originally Posted by LostMale28
Get a spray bottle and fill it with water start your truck and hit each COP with a few sprays of water and if one is messing up due to moisture you will find it.
It's running so bad right now it will be hard to diagnose that way. I'll try pulling the COP's and blowing out the plug holes with air first.

Lesson learned, don't ever steam clean these engines.
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Old Feb 21, 2010 | 01:39 PM
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^^ x2 My motor is starting to get dirty, but I'm afraid of trying to wash it because of this stupid design with the COPs. I drove through a snow drift earlier this winter and ended up replacing 2 COPs (at $50 each) and all of the plugs.

I would definitely try and take them off and blow out the plug holes, they do get full of water, and turn into little short-circuit pools.

No, you don't have to remove the fuel rail to get the COPs out, just unplug the connecter, and remove the small holder bolt and wiggle them out. Remember when putting them back in to use lots and lots of dielectric grease on everything, the plugs, the plug boots, the connecters, everything. They love dielectric grease.
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Old Feb 21, 2010 | 02:33 PM
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It must have all but dried up overnight. I started it this morning and it was still running a little rough but much better than last night.
Let it warm up, drove about 10 more miles on the freeway and now it's back to running normal, no misfire.
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