My buick with a 3.1 won't start, it starts and then shuts off. I checked the fuel pressure and thought it was a little low and pput a new pump in it and has same problem. I have spark and I jumped across the fuel pump relay and carry 45 psi fuel pressure,still no start. The engine will run fine on either. I have tried a module,ecm both crank sensors and have ohmed all the injectors and they are all 12.1to 12.3 ohms. I have no current codes or stored codes. I have checked all the fuses and looked at all the wiring and it appears to be okay. This car ran fine till one day I started it and backed up and it stalled and would start and shut off. Please help I am out of ideas!!! Thanks Pat
Feb 16, 2009 at 8:52 PM