My 2003 gmc sonoma 4.3 will crank over, but will not start. If I add fuel down the throttle body it will start and then shut off after the fuel is used up. I know I have spark. I cleaned the IAC and the map sensor. I also did a fuel pressure test. The results were 58 psi with ignition on and around 57 psi cranking. When I stopped cranking the engine the pressure stayed at 57 psi for more than 5 minutes. I'm thinking either a leaky fuel regulator, or fuel injectors, or even a vaccume leak? What do you think? Thank you in advance! Paul
have the same problem?
Thursday, December 27th, 2012 AT 4:34 PM