Question about 2004 Lincoln LS

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Running on half the power, running rich and rough idol

I have a 04 ls v8, my car was idoling rough and i didnt pay much attention to it. the other day i detailed it up and shampooed the motor, then i took it out for a drive and the engine light came on flashing and it is sputtering real bad , running rich and only has half its power, could it be the coil? if so should i just take it out and clean it up and dry it?

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You likely got water under the coil cover while detailing it. I would take the covers off, clean all the water out and dry it out. Take each coil out, dry it out and reinstall it with some dielectric grease in the boot and hope for the best.

I had a customers with an 02 LS recently that had a similar problem. I tried to get away with just replacing the problem coil. But every other week he came back with a misfire an another cylinder. We ended up replacing every coil and it's been good ever since. Be prepared to shell out for 8 new coils eventually. Get new covers while your at it. The coils are about $90 each, covers are $17 each.

Posted on Aug 02, 2009


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