ok at partial throddle my A/F guage goes completely rich and hold only 5 psi if i give it full throddle my A/f goel completely lean and my boosts jumps to 10 psi but im not feeling the boost the psi is fine but it just slugs down completely and like i said my A/F leans out but only under full throddle what the fuck HELP anybody!!
only have that cartech FMU and stock injectors with stage 2 hahn kit fully biult bottem end street port on the head custom 2 1/2" exhaust what could it be???????????????????

Do you have a fuel pressure gauge?

If it's just one of those blinky light type AFR gauges, they aren't reading shit unless you're at WOT. Only way to get a gauge that provides useful information all the time is to invest in a good wideband O2 sensor.

Stock injectors can't supply enough fuel for 10psi on a S16g. Turn your boost down to 8ish and your car will likely be faster and not have this issue.

Verify your boosted fuel pressure, too. Cartechs have been known to fluctuate and tend to not stay where you set them.

Originally posted by DarkOne
Stock injectors can't supply enough fuel for 10psi on a S16g. Turn your boost down to 8ish and your car will likely be faster and not have this issue. Verify your boosted fuel pressure, too. Cartechs have been known to fluctuate and tend to not stay where you set them.

Mine always moved the pressure around, sometimes by up to 10psi at idle if it wasnt corrected every now and then. I ditched that thing fast and moved up to an SFMU for a while.

I also agree about the stock injectors Even at 8psi the fuel pressure was scary high. Grab some aftermarket 310s if you want to run 10psi boost. and grab yourself and SFMU or look into a better tuning solution.

so it just might be my fmu prob is i keep throwing a cel either p1294 or p0505 one is injector high side open other is idle malfunction what the fuck but never both at the same time hooked up a datalogger to my car and it wouldnt read my cel for some reason kept on telling me i had no codes dud this car is a headache and a half anyone know what size injectors v6 avengers have??