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Bad misfire @5-6k...help please

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Old Mar 3, 2012, 01:28 PM
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Bad misfire @5-6k...help please

Ok another issue, to start off, car has 255 fuel pump, 1000cc injectors, jun cams, ams built ect ect.. I noticed it started mis firing about 2 weeks ago if you was to get wot, but it got worse, now it seems one whole cylinderr if not 2 isnt firing, idles perfect, normal driving is great as well, always shell or bp 93 oct or 110, its not bad gas...I changed the plug wires and spark plugs, same **** still happens...
Old Mar 3, 2012, 01:33 PM
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Speed density or MAF? What is the spark plug gap set at? When was the car last tuned?
Old Mar 3, 2012, 01:50 PM
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.023- car is tuned at 22psi pump gas... im thinking it's one of the factory coil packs.. its was tuned and maped by Chris at AMS...I bought the car from a guy that had her to 50k miles...20k on build..it ran great for about 6 weeks then this happened.. MAF Hmm maybe ill look at the sensor real fast
Old Mar 3, 2012, 07:31 PM
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Or maybe dirty injectors who loses spray pattern and capacity to fuel engine at high rpms?
Old Mar 3, 2012, 09:10 PM
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Check for boost leaks.
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