Thread: car wont idle. have to keep it running

Fuel filter has been replaced a couple months ago. I just put this engine in a few months ago so I have been replacing parts to get it to run good. I bought a used engine so I don't know exactly the mileage of everything on it. Ok ill have to rent a pressure guage from autozone then. The fuel pressure should be upwards od 50 psi correct?

Test the fuel pressure. Make sure it's around 45-50 psi. If that's normal, try cleaning your MAF sensor. I had the exact same problem, and the MAF sensor turned out to be the culprit. Make sure you use MAF cleaner or electrical grade contact cleaner.

Well I changed the pressure regulator. It took a few cranks and feathering the throttle, but now it starts up and idles fine again. I hope it the cure!