I'm attempting to troubleshoot a wiring issue with cylinder #6. Whenever I physically reach down and touch around the injector harness the car immediately dies. Almost like one of the wires is grounding out and killing the car.
There has been an issues with the car not activating the #6 injector. This is what I'm trying to figure out. Would anyone also have a wiring diagram? I google searched but didn't find any that were large enough to read.

 

Keeler, this is Jay, did you try replacing that injector clip and pigtails? Toyota plugs are notorious for getting fragile and breaking. I'd just chop that one off and replace with new clip and pins from toyota. Just go to toyota and order the clip housing and pins for a 94 NA supra and intall that and see what happens.

 

Why use new pins? Pins don't really cause a problem, its the clips that break. Just repin.

Sounds like there are other issues. Car will run minus an injector, dropping only one shouldn't kill it, just make it have a miss.

Provide more info on your car, setup, etc.

 

I've replace all the injectors and new clips. It didn't resolve the issue. It's a basic NA-T setup with a SAFC. Built head, EGR removed, factory intake manifold, throttle body, ecu. It has brand new/ recently replaced plugs, wires, cap, rotor, headgasket, turbo, and some other items. I'm also showing good fuel pressure and it's not losing any pressure until the car sits for a couple hours.

The car will run fine on 5 cylinders. Show's great compression on all 6. The issue is the #6 injector isn't firing. When I physically touch or move the wire/clip on #6 the car dies. I have been unable to find a wiring diagram and haven't yet start cutting the harness shielding to trace the wires. I was hoping I could find a diagram to see what the #6 injector wires go to without having to physically trace them.

 

Injector 6 wires should be:

Black/Orange to pin 3 on connector ij1 for power
Lavender(Blue)/Red to pin 15 on the large ECU plug.

 

You're the man! I'll look into when I have time tonight.

 

Well I went through some things last night and couldn't get the car to start. I pulled the CEL and it came out as code 12 so I replaced the distributor. It fixed the CEL but still wouldn't start. Currently the injectors aren't pulsing at all and I'm getting no spark, not even to the coil. Looks like it may be an ECU issue, I'm going to replace it when I have some free time and can locate one.