I'm having a problem. When I drive my car down the highway the a/f ratio is around 14.5. I'm now having a problem that seems to be getting worse. I'll be driving along and it will go from 14.5 down to 10.0 or lower and go super rich and just about flood out the car just about unless I hammer on it or get totally out of the gas. I've also noticed that I'm getting alot of backfire when i slow down now. I noticed it a few weeks ago but now after my last autocross it seems to be getting bad. I almost didn't get it home from the last race. Any suggestions?

I changed out the plugs thinking it might be that but no luck. I thought it might be a bad leading coil but that turned out to be ok as well as the trailing coils.

I'm thinking its either that the CAS is bad or that somehow the timing is off. Anyone have anything?

mods:
haltech e6x
680cc P, 1600cc S
255lph pump
2nd gen coils
others

 

Who tuned your map? You could be hitting a bin that has been untuned...

Also could be an injector in the process of failing. When you pulled the plugs, how did the they look? Was one really black while the others looked good?