Holley Projection question.....
Hi, I know that there are a few people running the same kit as I am. The Holley projection 670 CFM kit
I got a question for ya.......
I can tune the dang thing and it will run great on the bottom end, but a soon as I stab the throttle it goes lean.
What could cause this?
Here is the breakdown on the setup. I have tried adjusting fuel pressure from 15 PSI all the way up to 30 PSI. ECM is tuned except the accel, that is pegged full. The TPS is set at .647 volts and return PSI is 0.
I'm at my wits end and ideas would be appreciated.