Hi,
If you have fuel pressure within the manufacturer's specifications, then suspect the injectors are either not getting power or they are not getting a ground signal from the PCM.
At each injector, there are two wires. Each injector will have a gray wire that should have power with the key in the run position. That is what I need you to check first. If there is no power, go back to the fuel pump relay and the ECM B fuse in the under-hood fuse box.
If there is power, disconnect a injector. Take a test lamp and connect the alligator clip to the battery positive and probe the wire in the connection that is not gray. Have a helper crank the engine. The test lamp should flash on and off as a ground path is provided.
Do these things and let me know the results. Also, I attached two pics below related to the injectors and the power supply to them. Interestingly, there is a large splice in the wiring that is common to all injectors. If there is no power, we will need to check that as well.
Let me know what you find. Note: If you hear the fuel pump turn on, the fuse/relay isn't the issue. At that point, if there is no power at the injectors, I would suspect the splice.
Joe
Images (Click to enlarge)
Dec 5, 2022 at 5:25 PM
