brando1985

Alright, I recently bought an 88 TII. The car ran perfect, unless you tried reving it above 3800 RPM. A week later I got sick of the problem, so I ripped off the upper intake and saw that one of the secondary injector wires had been totally fried. I traced it, and the wire had been burnt all the way down to the ECU, and fried the ECU as well.

So to fix the problem, I bought a wiring harness that was off an 87 TII. This harness was designed for low impedence injectors.

I bypassed the resistor pack, by cutting off the plug, and wrapping all the wires together. This allowed me to use high impedence injectors with an 87 TII harness.

I cut off the ends of the s4 harness, and installed s5 plugs on it so the high impedence injectors could be used.

I installed the new harness, the new ecu. I also installed new injectors that were previously on my s5 TII, just to make sure it wasn't an injector that made the harness catch on fire the first time.

On the first try, the car started right up, but ran like absolute crap. I eventually realized that my injector wires were going to the wrong injectors.

I fixed the injector wires, and attemped to start the car. I noticed some smoke coming up after I had cranked the engine for about 5 seconds.

I got out, and saw that the injector fuse (second fuse from the engine on the fuse block) was cooked.

I pulled off the upper intake again, to find that the

SAME WIRE THAT WAS BURNED ORIGINALLY, WAS BURNED AGAIN.

I haven't checked to see if it fried the ecu again or not because I was royally shitty at the time, but I'm at a total loss as to why it keeps burning.

A new ECU, HARNESS, and INJECTORS were installed.

What caused this secondary injector wire to melt for the SECOND TIME??!!?!!!??!!

Sorry it's so long!

Thanks,

Brando

HAILERS

Disconnect the injector plug. Put your meter on one wire at a time. One lead of the meter on ground the other on the wire. Meter on ohms. Which wire has a dead short? Follow that wire back to its other end til you find the short.

It would help to know which of the two wires has the dead short. IF you see a dead short....then disconnect the plug at the ECU and see if it's still there. Still there? Then follow the harness til you find the short to ground.

Which injector again???? Front/rear? Primary or secondary? What color is the wire that is shorted out???? As in green/white, green/red etc.

How about this.....a bent pin at the ECU. It'd be the small plug. Look at the pins of the small plug and see if one is bent over touching the case.