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need help with a backfire plz

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Old 10-12-2006, 02:58 PM
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Default need help with a backfire plz

i just put my tranny back in my car started it up and it did great, but like the 3rd time i started it the car started back firing bad at idle.... no hesitation, no miss or anything... just a backfire coming outa the pipes... i have true duals and it was only coming outa one side.. also was doing while holding a steady throtle going down the road.... change my plugs new exhaust gaskets as i had a exhaust leak... started it back up and its still doing the same thing....i hammered on it and it ran great... pulled very very strong...im not sure wtf is going on here.. i just changed the wires about 8000 miles or so ago... coil packs have never been changed and its got over 150k on the clock.. possibly an issue or wouldnt that cause a misfire as well? anyhelp would be greatly apperciated guys thx... Jesse

edit.. car sat for about a week while waiting for tranny to be put back in
Old 10-13-2006, 01:30 PM
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have you run that tank of gas out?....is it throwing any codes? and if you can hook it up to efi live and see what your fuel trims and spark ratios are.....check back




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