May 17, 2005Please help.I have a 89 silverado truck with a 350 with a tbi.The truck starts but dies, but before that it didnt start at all until I replaced the injectors and a fuel pump and it started but dies .I know I am getting close to get running but needsome more help trouble shooting. thanks in advance
Forums : General Tech Questions : Starts but dies when given gas (414 Views)
Subscribers : villaez
May 17, 2005maybe try the Throttle position sensor, and maybe the fuel filter...
May 17, 2005You really didn't give much info, but I'll try ...... First off, because you're asking about the fuel system, I'm assuming you checked to make sure that you're getting spark at the plugs and that you've got fuel, and I mean good fuel in the tank. Do not go by the fuel gauge. Dump 5 gallons of fuel in it out of a can. Had a buddy with this problem. Turned out his fuel gauge was wrong and he was actually out of gas. Also you say "350 tbi" and "I replaced the injectors". By this statement I'm led to believe you replaced the 2 injectors in the TBI unit, correct? and you also replaced the fuel pump, right? Did you check the fuel pressure before and after you changed the pump? To make sure that the pump was your problem? Although the injectors do go bad in a TBI unit, it's not very often. The pieces that cause the most problems in those are the IAC (Idle Air Control) motor and the fuel pressure regulator. The regulator is cheap and easy to replace, the IAC is a bit more money. Also make sure the TBI mounting gasket is OK. A massive vacuum leak will cause the same problem ......