hello all, i have a new issue ive been fighting since the last time i ran at the track about a month ago. That day, on the way to the track, the car would spit and sputter as soon as i got to about 10 psi. Once at the track however....it ran beautiful. ran my fastest 1/8 mile time ever and the engine didnt miss a beat. Then, on the way back home doing a few highway pulls it was backfiring/skipping under boost again. other wise driving like a champ.
Since it been so nice lately ive been driving the car more often on the daily. I am having the same issue. Car drives amazing until it gets into boost,about 10 psi or so. Then it skips like crazy. Sometimes feels like random skips, sometimes it feels like its on a 2-step. Sometimes it backfires and engine looses total power until you take your foot off.....then it returns to idle and you can continue driving like normal.
I have changed plugs twice with the same ngks i always use and tried a set of ac delco. disconnected 2 step. swapped coil packs with a spare i had that never had an issue before. FP rising 1:1 with boost (i have transducer for powerlogger). TPS voltage smooth the whole range of travel. It happens after MAF reaches 255 so i have no reason to believe its that. Alt voltage and all grounds good.
I have not replaced wires yet, they appear fine but that doesnt mean anything.
I am pretty sure my sig is up to date.
any help is much appreciated.
Nick
Since it been so nice lately ive been driving the car more often on the daily. I am having the same issue. Car drives amazing until it gets into boost,about 10 psi or so. Then it skips like crazy. Sometimes feels like random skips, sometimes it feels like its on a 2-step. Sometimes it backfires and engine looses total power until you take your foot off.....then it returns to idle and you can continue driving like normal.
I have changed plugs twice with the same ngks i always use and tried a set of ac delco. disconnected 2 step. swapped coil packs with a spare i had that never had an issue before. FP rising 1:1 with boost (i have transducer for powerlogger). TPS voltage smooth the whole range of travel. It happens after MAF reaches 255 so i have no reason to believe its that. Alt voltage and all grounds good.
I have not replaced wires yet, they appear fine but that doesnt mean anything.
I am pretty sure my sig is up to date.
any help is much appreciated.
Nick