Aletheis

hi, i got 1992 5.0 with the sotck engine, bbk intake, pulley, bbk headers, bbk x-pipe, flowmastes exhaust system, and all the gnition system msd.

my car at idle is on 19.5 (too lean) when i go a WOT stabilizes a bit, but a full throttle the car go to 11.1 to 10.1 (too rich) i change the ect sensor, i put the 2 o2 sensor new i really dont know what to do.. sometime the car go to lean when i accelerate full throttle (19.5..) i change the pump and filter..

I just thinking to change the fuel pressure regulator.. could be that??

Please can somebdy give a opinion o recomendation..

Thanks..

g3mustang

what is the fuel pressure with the vacuum off and then when you put the vacuum line back on it should drop 5 psi