Quote:
Originally Posted by TittoBlunt
I had something similar to this for a few months. I would feel a small thump as well. My idle was pretty stable though. If anything, it would change by 25-50 (needle barely moves). I changed spark plugs with no change in idle. But then I changed the coils a few months later and it cleared out the "thumping" and I gain back low end power and gas mileage. The coils weren't throwing any codes too.
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Quote:
Originally Posted by Cir14
If it was a bad coil you would know it. I blew #6 awhile back, power will be severely lacking.
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Seems like it comes down to this... is it possible that the coils are causing a problem even though no code has been thrown? Is this known?