Spitting flames at WOT and when shifting...

[ILLiCliPSE]

Hey guys...

I noticed my car starting to backfire at WOT at around 4k rpm, and according to some of my friends, Ill shoot a flame with a little smoke. What could be causing this? Im recircing my bov, so it cant be that...this started after I installed my apexi n1 tbe. Im running no rear o2 sensor...could that be the problem? It has an o2 plug in it, so it isnt a leak. Im running a MBC, spike to 16-17 and falling to 12-11. Also, could it be as simple as changing out the spark plugs?

 

[Midnightride]

Are you running a Cat or high flow Cat just straight pipe? I would think you are running rich. I would check the spark plugs like you mentioned.

 

[JayRolla]

Yea thats a sign of running real rich.

 

[LordDigi]

I would start with checking the spark plugs for correct gap. Then check your base timing as well as your 'corrected' timing. A logger would be your best friend right now I'm not too familiar with the 2g duel o2 setup but that might have something to do with it.

With higher EGT's and running a rich condition at points could easily lead to throwing some flames. This also could be do to a boost leak. I think your next investment should be a logger

 

[ILLiCliPSE]

LordDigi...you hit it dead on ...Im gonna try and grab a logger with a s-afc asap. I just got back from NAPA and I installed some new NGK BPR7ES's. Not sure if Im shooting anymore flames, but it feels good. Ill do a boost leak test ASAP. Oh ya Midnightride, I have the APEXI N1 turbo-back, which is a cat-deleting system.

Thanks for the help guys
any other comments are welcome

 

[LordDigi]

Hey NP man Let us know what your results are