/I just purchased a 1991 GMC Vandura 2500 5.7 engine with 70679 miles on it. I replaced the fuel pump, O2 sensor, Temp sensor next to the thermostat new plugs wires and distributor car, MAP sensor and put a rebuild kit on the TBI it starts then immediately dies but starts rite back but idles smooth sometimes and sometimes the idle is up and down. Another thing the gasket between the tbi and intake manifold did not cover the entire base of the tbi between the two ports but around the base was covered. At highway speeds its smooth then gets rough. If i baby it it runs fine after about 50 mph but if i put it under any kind of load it tries to bog down/
- posted
7 years ago