Recently installed a Vortech V-3, T-trim supercharger kit from A&A (w/ 60 lb injectors) + longtube headers and a ported throttle body into a 2004 Z06. Since starting her up, I have been getting the P0300 code. I have replaced all sparkplugs a second time as well as changing the sparkplug wires again. Also tested each coil with a timing/strobe light and all seem to be good. When I hook up a scanner, it sporadically states P0301 (and always shows P0300, just like the DIC) but I’ve check & rechecked cylinder #1 and it seems fine. When I listen to the engine while the car is running, it seems the misfiring occurs on Bank 2 (can hear the actually misses); this was also evident with the strobe light when I was testing coils as there was a slight miss on cylinders #4 and #6. Also, I noticed a strong gas smell and when actually smelling each exhaust tip, I can smell it from only the passenger side exhaust tip, though I do have an X-pipe which is probably crossing the gases. Also, the freeze frame data from my scanner is showing the following for P0301:
STFT B1 0
LFTT B1 25%
STFT B2 0
LTFT B2 4.6-6.2%
Why the large variance between Bank 1 and Bank 2? Oh, I have also replaced the O2 sensor in Bank 2 (passenger side) but it hasn’t changed a thing.
While the car is running, the scanner displays the following “live data”:
O2S B1 S1 (V) 0.445
STFT B1 S1 (%) 0
O2S B1 S2 (V) 0.445
STFT B1 S2 (%) N/A (rear O2s removed)
O2S B2 S1 (V) 0.21
STFT B2 S1 (%) 0
O2S B2 S2 (V) 0.445
STFT B2 S2 (%) N/A (rear O2s removed)
Again, why the discrepancy between O2 sensor#1 in B1 and B2???
Can anyone point me in the right direction? I feel like banging my head against the wall with all the problems I have been having with this install. Thanks to everyone!
P.S. – Also have HPTuners so I can post data if needed.
Corvette Store
A little help would be appreciated....
