Chevrolet Repair: rough idle and no power, gmc s15, fuel spray

Question
hi thanks for your time , i have a 1992 gmc s15 4.3 tbi
and it idles rough when it gets warm and has no power,
I have already changed the plugs, wires, dist , rotor buttom, checked all vaccum lines, checked throttle postion senser its ok  , cleaned egr ,, its has a fairly new fuel pump to. you got any idea what it could be ? i thought it could be the fuel injectors but i hate buying them  because there like 70 dollars a piece . thanks ben

Answer
Hi Ben, The TBI unit was always a big problem area. You should remove the TBI unit and clean all vacuum passages on the under side. You might have to use a piece of wire if it's really bad. The fuel injectors can also just stop working then start again. Sometimes you can see this if you run the engine and watch the fuel spray from the injector. This is all there is for this one.

Hope this helps

Have a Nice Day              MARK