Engine revving up and down on its own

I will look and let you know what I find. That may be enough to tell you. Sometimes they use the same color twice but I will send you what I find.

Sorry for the delay. I have been traveling all week for my full time job. Here is the document that you need. Looks like the middle connector (B - White connector) has a pink wiring that is for the governor pressure control. The pink and black is the transmission relay control. Hopefully this helps. Let me know what you find. Thanks

Well I can't say I have ever tried that to see how the engine runs but if the driver wire was not correct, I suspect the injector wouldn't operate. This is a ground side control. That means the PCM grounds that driver wire and that opens the injector. The other wire is a constant power wire when the key is on coming from the ASD relay. When the PCM wants the injector to fire, it grounds that driver wire, the injector opens and then it removes the ground creating an open circuit and the injector closes. Assuming the wire that is there rather than the driver is a wire with voltage on it, I suspect the injector will just remain closed or possibly fail. If the wire that is there rather than the driver wire is a ground wire then the injector would be open all time. Either way, I would imagine you would have a dead misfire on that cylinder.

Plus, you would have a DTC for an injector circuit issue.

Are your injector wires a different color? Remember this lists all 8 injectors so your engine does not have 7 or 8.

Ok. So the way to test if a wire is hooked up to where it is supposed to be is to use a multimeter and do what is called a continuity test. Set it on resistance and unhook the PCM connector and then the other end of the circuit. In this scenario lets just say it is injector number 1. So you have the PCM connector unhooked and the number one injector unplugged.

Get a small safety pin and put in the front of the connector on the PCM terminal in the pin that goes to the injector. Then go to the injector connector and disconnect it and put another safety pin in the terminal of the wire coming from the PCM. Just make sure you use a small pin. If it is too large you can spread the terminal and it will not make contact any more and cause an open circuit.

Then with your meter set on resistance, touch one lead to the PCM safety pin and the other side to the injector safety pin. You should have a small amount of resistance like less than half an ohm. This is just the normal resistance of a copper wire. If the meter is reading OL, zero, or is blank then this is called an open circuit which means the wire from the PCM is not going to the place it is supposed to.

Have we done anything about checking for a vacuum leak? If the IAC and TPS are good, the PCM is replaced then we may have a vacuum leak.

Here is a guide that will help determine if you have a leak. Let me know what you find. Thanks

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge