2001 GMC Safari stopped running and fuel coming out of muffler

2001 GMC SAFARI
103,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
2001 GMC Safari mileage: 103,000. My GMC Safari stopped running. After going through the whole fuel system I found that the fuel pump was bad. I had only forty psi. When I replaced the pump the van started right up. The pump gave me sixty psi then the van stopped again, no fuel pressure at all. I can hear the pump running. I climbed under the van to see if it was leaking, I found I had fuel coming from my muffler. Can you tell me what happened and how to fix it?

Jan 10, 2011 at 9:22 PM
Advertisement
Avatar
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
It appears that the fuel pressure regulator diaphragm has failed, dumping raw fuel into the engine. Another possibility is that a fuel injector stuck open. Replacing the faulty part should fix your problem.
Jan 10, 2011 at 9:30 PM