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Originally Posted by larry4888
Also, the PCM wire that I ground to get the pump to come on goes directly from the PCM to the relay. If the PCM wasn't getting a crank signal to fire the injectors would the truck still run when I put fuel in the intake?
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When I had mentioned the crank signal, it was more or less thinking out loud on my part. That's when I said that if the truck would run when you pour gas into the manifold, then it must be firing the spark plugs. Thus, you have a crank signal. I'm just thinking what input is missing (if this is the case) to keep the fuel pump and injectors from firing. Oh, on the injectors, you'll have battery voltage on both sides of the injector when not being pulsed by the PCM. Battery voltage supplies one side and the PCM will ground the other, thus energizing the injector(s). I'll take a look at my diagram and see what I come up with. I'll post back tonight and hopefully have some more insight into your problem.