Vengeance is mine
Well here goes..before i get flamed I DID do a search and came up with nothing on this problem. I installed a vpc and safc2 today, my car is running stock twins, bpu with a 3row and about 20psi. The problem I'm having is that the car runs great through first and second gear, as soon as I try to boost in third it feels like the car is being "held" back, where second feels nice and crisp, third still pulls but feels like it is bogging down somewhat. I have tried leaning it out up to -8% on the afc with all the vpc knobs 12 o'clocked and it didn't really help. If i stay on the throttle the car sometimes will make a little "pop" (almost like a very weak backfire) if I keep the gas on after this as the rpms rise it will generally clear up a little as i get to around 6k+ rpm's. Anyone have any ideas about what it could be? I have tried all different settings on the afc from leaning out to rich (all adjustments made above 4k) and very small change between the two. The afc IS wired correctly and I have gone over all connections on the afc and vpc very carefully. The vpc map also is run to it's own vacuum source. Anyone have any ideas? In my opinion it almost feels as if the car is loading up between 4k and 6k in 3rd gear and above. I replaced the plugs with denso's gapped to .032 not very long ago, and also tried resetting the ecu this evening but it didnt help at all. Any help would be appreciated thanks.