Heres the dilemma,
I have my 88' mustang at a local motorsports shop. The tech installed a 331 motor w/ trickflow top end kit(Track Heat, Stage 2 cam). Also things to factor are a 70mm Accufab TB, 80mm PMAS meter, 30lb injectors, new IAC, and a kirban FPR.
Well going to pick it up tonight and the a/f ratio is at like 14.5- 15.5 at idle. Car idles at 1100 and stutters a lil bit. Fuel pressure is at 35 psi. Well on the dyno it of course leans out at around 4000 rpms.
So we set the fuel pressure to 42-45 psi and it smells really rich and won't idle worth a damn. A/F ratio is alot better at 11.8-12.5 at idle. We are stumped on how to get the car to idle correctly and not lean out while driving.
1. How do I get the car to idle with the proper fuel pressure/a-f ratio?
2. Will the car always lean out at higher rpms with out a programmble tuner?
Thanks for the help, I appreciate it.
I have my 88' mustang at a local motorsports shop. The tech installed a 331 motor w/ trickflow top end kit(Track Heat, Stage 2 cam). Also things to factor are a 70mm Accufab TB, 80mm PMAS meter, 30lb injectors, new IAC, and a kirban FPR.
Well going to pick it up tonight and the a/f ratio is at like 14.5- 15.5 at idle. Car idles at 1100 and stutters a lil bit. Fuel pressure is at 35 psi. Well on the dyno it of course leans out at around 4000 rpms.
So we set the fuel pressure to 42-45 psi and it smells really rich and won't idle worth a damn. A/F ratio is alot better at 11.8-12.5 at idle. We are stumped on how to get the car to idle correctly and not lean out while driving.
1. How do I get the car to idle with the proper fuel pressure/a-f ratio?
2. Will the car always lean out at higher rpms with out a programmble tuner?
Thanks for the help, I appreciate it.