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Checking Fuel Injectors
96 Chevrolet C1500 1/2 ton truck, 4.3l 6 cyl
Hi, people I am slowly trying to run down the cause of an intermittent misfire on the truck above. It gets warm, then the MIL comes on and it starts running bad. I have replaced plugs, wires, cap & rotor. The ignition module checked out OK. Can't find any vacumn leak by physically observing. When I pulled the plugs on Bank 2, they were all wet with gas. I think this (extra gas) is being caused by the motor being in open loop operation because of the MIL being lit, because the misfiring doesn't start until it is warm. The MIL code is P0300 random multiple misfire. This misfire I suppose could be caused by a injector stuck open or something along those lines. In order to test this, couldn't I switch the two injectors (it is TBI) and see if the gas problem shows up on the other bank? If so, could someone give me the procedure to do this? I am not sure what an injector looks like :-) Do you have to remove the throttle body to get to them? The fuel lines enter the manifold behind the throttle body, going into a thing that has a single bolt sticking up between them. Is this the injectors? Yes, I know this sounds dumb. Thanks for helping a dumb girl, Libby |
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