Fuel injectors

I dug through the wires on the harness to find the tan one you told me about and it went to the no. 2 pin hole and it didn't give me a reading on ohms, it was bundled with the other wires in really thick insulation, it runs all the way down to back behind the intake so following it is pretty hard. At least I know what I'm looking for now, thanks for all your help!

Yeah I set my multimeter to the lowest setting on ohms and it it didn't budge, I even tested the multimeter to make sure it was working right and it was. I traced the wires from the injector as far back as I could and didn't notice any frayed wiring.

I looked at the diagram ken provided and it looks like the tan wire goes straight into the pcm and the purple wire goes to the idle air sensor ontop of the throttle body, the tan wire was the one that didn't light up the test light. If the wire is good then does that mean it's the pcm or should I run some tests else where? Thanks!

I think I may have a solution to finding the problem, what if I took the tan wire from the pcm harness and connect a new wire to it and run it around and connect it to the injector harness, that way if it still runs bad that would mean the pcm is bad, what do you think? Thanks!

Ok I will, I'll let you know what they find out, thanks for all your help!

By the way, there is another clue if it helps, if it's warm outside like 80 or above, I'll notice that if I drive it down the road and turn it off for a minute and start it up the problem goes away, then about 5 or 10 minutes later it slowly comes back, then goes away and comes back, and sometimes when I accelerate it goes away then comes back. If that helps narrow it down let me know, thanks.

I did one final test another mechanic told me about, he told me to do a continuity test with the multimeter from one end of that wire to the other so I did, I tested it like I did before from the pcm harness to the injector harness and it gave no continuity, no beep, no reading. But I will still get a mechanic to look at it to make sure, thanks for all your help!

Hey everyone, I thought I'd give you an update on the situation I had, I had a mechanic look at the issue and he concluded that it was pretty much the pcm causing my problem, so now I bought a pcm from napa and had a dealership instal and flash it, and the results? Only half fixed. It made the rough idle slightly better and eliminated 2/4 trouble codes, the circuit malfunction injector 1 and lean condition bank 1 is still there. I did another test with a noid light for that injector and the light flashed when running. A tech at the dealership said something that he noticed the wire harness looked kind of twisted and could be causing the slight miss but thats not a actual diagnoses.
Sorry for such a late update. Thanks!

The only two codes left are p0201 and p0171, thanks Ken.

Thanks ken, is detrimental to the pcm to drive it this way? I sure wouldn't want to have to replace the pcm again.

Thanks Ken, I'll let you know what happens.