Misfire - need help
I need help figuring this one out. When I start the car up after sitting for the night the car has a slight miss on light acceleration. It goes away after about .5 miles and then the car runs fine. It doesn't happen all the time, but it does happen most of the time. I noticed shortly after I installed LT Headers by dynamax. Here are my mods
Whipple
Rotofab CAI
Dynamax off road LT (No Cats)
vmax ported tb.
jannetty Tune
Here is what I have done to diagnose.
Talked to ted about the miss. He had me datalog, found out cylinder 2 & 8 had a misfire. We determined it isn't in the tune and must be mechanical.
changed plug wires, cleaned CAI, clean MAF - no change, same cylinders are misfiring.
Changed Plugs, did compression test & Leak down test, and check whipple for vac leaks - Plugs looked black so I changed them and it still has a miss. I haven't datalogged to see if it is same 2 cylinders, but I'm sure it is.
Mechanic said that my headers are hitting the floor boards because he could hear it??? any help would be awesome.
Thanks
Keith
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