Loren jones
Enthusiast
08 Coupe, 23,000miles.
OK, over the winter I did full Belanger headers/3" cat back, catch can, smooth tubes, pulley, other miscellaneous other items. Anyway, car is up and running but has a off idle stumble, seems to be missing at idle and at higher RPM missing loudly, loud backfires as well on decel, although it did the pop,crackle before but is considerably louder with headers. Checked codes and had 4, P0098, P0100, P010A, P0113. All, I believe, had to do with having the air box out and battery disconnected. Cleared with scanner and they haven't come back after fully warming engine and trip around block. Pulled all plug wires and cleaned contacts, no change. Plugs and wires both have about 11,000 miles on them, Quality wires, plugs are stock replacements. Car came with Prefix/Arrow computer. It sounds like it is on the drivers side, not hearing it on the passenger side. I did have the scanner hooked up on drive, watched the fuel trims, but honestly not sure what I'm looking at. they mostly stayed under 10%. Also, I sprayed carb cleaner around vacuum areas, didn't notice a change, for what its worth. Any help would be appreciated.
Thanks,
Loren
OK, over the winter I did full Belanger headers/3" cat back, catch can, smooth tubes, pulley, other miscellaneous other items. Anyway, car is up and running but has a off idle stumble, seems to be missing at idle and at higher RPM missing loudly, loud backfires as well on decel, although it did the pop,crackle before but is considerably louder with headers. Checked codes and had 4, P0098, P0100, P010A, P0113. All, I believe, had to do with having the air box out and battery disconnected. Cleared with scanner and they haven't come back after fully warming engine and trip around block. Pulled all plug wires and cleaned contacts, no change. Plugs and wires both have about 11,000 miles on them, Quality wires, plugs are stock replacements. Car came with Prefix/Arrow computer. It sounds like it is on the drivers side, not hearing it on the passenger side. I did have the scanner hooked up on drive, watched the fuel trims, but honestly not sure what I'm looking at. they mostly stayed under 10%. Also, I sprayed carb cleaner around vacuum areas, didn't notice a change, for what its worth. Any help would be appreciated.
Thanks,
Loren
