Backfiring after 650 install

[dirtbike_79]

I decided to put my 650 injectors in yesterday, and I spent about 30 minutes or tuning the low throttle point on my afc. I tuned it using low fuel trim and o2 trim, and I have my throttle points set at 30% and 70%. The car runs great at low throttle but I can't go above 30% throttle without it starting to backfire and buck. I have tried setting my high throttle point to the same as my low throttle point, same thing. Tried setting it to 0 and the same thing happens, but if i change the low throttle point to 40% then I can go to 40% throttle before this starts happening. Any ideas?

 

[spyderturbo007]

For starters, you aren't going about this tune properly. Setting the boost to 20psi and then just turning the knob from -40 to +30 isn't going to do anything more than increase your chances of blowing the motor.

Are you sure the settings on the SAFC are correct? Have you verified the wiring? You should set the sensor type to Karmen with the arrow pointing North East. TPS trigger points should be set at 30% and 80%.

 

[1badgstdude]

timing is off or too much fuel igniting

 

[dirtbike_79]

My settings on my AFC where -22 across the low throttle board. I wired it exactly like vfaq, and if it wasnt wired correctly, wouldn't it not work? It is set to Karman with the arrow pointing north east. My tps trigger points are set to 30% and 70%. I still have a 1g maf, could that be causing the problem?