05 Pontiac Grand Prix 3.8 N/A
Ok, so my GTP has been having issues from one end to the next... Replaced Gummed up injectors, TPS, IAC, Fuel Pump 2 speed relay, and supposedly the guy that owned the car before me (who told me he bought and sold cars after he fixed them... But had apparently given up on this one...) said he installed a new fuel pump. Fuel pressure tested at 42 lbs. Then got worse quick. But I checked voltage and it's only getting 2.5v to the pump. Even after turning the car over... Now, I know there is a fuel pump control module somewhere... But I was curious if anyone knows how to test the module? What voltages does it apply at idle and under boost? Now... I did take a battery and hooked 12v directly to the pump and it was still low psi! So I have got a new one... But that doesn't fix the voltage being low to the pump! Where if any... Are there any grounding problem areas for the pump I should check?🤔 Is there another sensor that controls the fuel pump control module? And where is the module located? I've looked online with no luck finding it where I would think it is located from looking online. Any info to point me in he right direction is appreciated!