1992 gmc sonoma truck 4.3l tbi. Engine shuts down like it is running out of fuel. Fuel pressure is good. Ignitions is good and has good spark. The injectors just stop working. I can pour a little fuel in tbi and it runs. I can wait 5 to 15 min and turn it over then it doesn't start.
Fuel pump stopped working. I replaced complete fuel pump/sender assembly. It worked great for about one month. The fuel pump is making normal noise as if it is working. It does have correct fuel pressure. Engine has spark. When running engine runs very good and has good power and does not stutter like it was doing before fuel pump was replaced. I am thinking fuel pressure regulator which is part of the throttle body but can not be tested. Or ECU is doing something to shut injectors off. Is there some other test or recommend what to check? The problem is it is not consistent. It can start up and run great, and restart. Then the next time it would not restart. I do not like to just buy parts without confirming it is bad. Thanks for the help
Sunday, February 5th, 2012 AT 3:20 AM