78 f150 4.6 swapped return fuel system need help!
I've been reaching the forum for weeks trying to figure out how to tune from returnless to return for this with no luck. Found lots for the gm stuff but nothing applied to me.
Anyways I pulled the 4.6 2v and 4r70w out of a police interceptor. I used a ron Francis wiring harness that retained the stock fuel pump controller. All I have to do is tune it for the return system. The only options I get under the fuel system tab are:
Flow max
Desired voltage
Off duty cycle
I've changed all the values in the desired voltage to 12 volts. But when running it underdrives my pump to 2.4 and drops my fuel pressure to 23 psi
Do I need to make changed under the engine tab?
Right now the truck is undrivable. It idled great and sounds awesome but any acceleration it falls on its face and even pulls all timing.
The only thing changed on the motor is fuel system. Otherwise it's still stock with long tubes and cold air
If you need any more info please let me know!