My 04' Cobra has recently developed a slight hesitation at low rpm's, almost seems like a plug cutting out.
The car was bought new and now has 11,000 miles, and is modified with a K&N Fipk, MAC O/R Prochamber w/ MIL eliminators, and a 3" Flowmaster catback. All else is stock.
Out of curiousity I pulled all the plugs and they all look as expected in fine condition only I checked all the gaps and they were all set (factory set) at around .036 to .038. I re-gapped all of them to right at .043 and buttoned everything back up but there is no change in the aforementioned hesitiation/misfire.
All else looks fine, the coil packs looked fine, the only thing of notice was the passenger side plug/coil against the firewall, upon removing the coil/plug cover plate I could see what looked like sand/mud/silt in a relatively small amount isolated to that area of the valve cover. I would suspect it is intrusion coming through the rubber grommet at the rear of the cover plate.
With my mild mods would a change in plugs be an advantage? Any educated recommendations on plugs and gaps would be appreciated!
Thanks for the help!
The car was bought new and now has 11,000 miles, and is modified with a K&N Fipk, MAC O/R Prochamber w/ MIL eliminators, and a 3" Flowmaster catback. All else is stock.
Out of curiousity I pulled all the plugs and they all look as expected in fine condition only I checked all the gaps and they were all set (factory set) at around .036 to .038. I re-gapped all of them to right at .043 and buttoned everything back up but there is no change in the aforementioned hesitiation/misfire.
All else looks fine, the coil packs looked fine, the only thing of notice was the passenger side plug/coil against the firewall, upon removing the coil/plug cover plate I could see what looked like sand/mud/silt in a relatively small amount isolated to that area of the valve cover. I would suspect it is intrusion coming through the rubber grommet at the rear of the cover plate.
With my mild mods would a change in plugs be an advantage? Any educated recommendations on plugs and gaps would be appreciated!
Thanks for the help!
