I have a 1989 Firebird with tbi that the previous owner converted to carb. Butchered the harness and I could use some help putting it all back. Not concerned with the smog stuff. Just want it to run, drive and the cruse and ac to work. So far I have a Performer intake (old owner) with a TBI conversion plate installed. The coolant temp sender is hooked up and the MAP sensor. TPS and everything on the throttle body is hooked up. In the harnes I have two pink w/BLK strip wires reading 12v, one BLK w/brn strip 0v, one brown Varied Mini Voltage, A blk 3.9-4 mini volts, Green w/blk stripe 37.1 mini volts, and 2 plug ins, One with orange w/blk strip wire and a grey wire, and the other with brown wire and blk wire. Do I have everything I need to get it to run? I have hooked it up to my scanner and have two codes, a 34 code and a 53 code. Some real help from some one with great knowledge is defiantly needed. This is my first TBI restoration. The car is for my son and I would realy like to get it running and driving before I begin with the body work. Please help.
Dusty

 

you said PO converted to carb, so are you converting it back?

 

Yes, It was a hack job. It would start and run, but nothing else worked. The has potential and my son always wanted a Trans-am. I have been working on the car for several months. Mostly on the weekends at my place of work. I finally got the engine and trans rebuilt and back in the car. The rest of the suspension and so on is also new or rebuilt and back on the car. He doesn't know anything about it . He turns 16 next month and I was hoping to get it done by then. By the way things have been going lately it's looking grim.

 

if its been converted to carb,...and hacked and your trying to go back to original,....geeez,....youve got your hands full. do you have a manual for the codes? off the top of my head,...code 34 is a burn off relay.???? gray wire,...est? to be disconnected when you set the timing. the pinks should go to the "hot" side of the ignition and coil. brown,...oil pressure. im no expert,...just trying to help a lil, and i could be totally wrong? see what a few others say first. best of luck, Joe

 

All the wires I am dealing with and the two plugins are on the passenger side in the same loom as the injector wires. It seems to be the main loom. It runs rite down the pass side of the engine. I'm assuming there the smog pump, egr, or something along those lines. The big thing for me is what I do and don't need in order for this thing to function.

 

you are going to be in for the long haul, the previous owner probably converted to carb because the car had wiring issues to begin with. At least in my travels thats the main reason for the swap so even though you reconnect all the right sensors and wires you may still wind up troubleshooting.

 

maybe it would be easier to just get a new wire harness.

 

Find ECM #?? 1228746, prom??, mat =blk, tan, coolant temp sensor= blk, yel, map sensor= a=ppl, b=lt grn, c=gry, idle air control= a=lt blu / wht, b=lt blu/blk, c=lt grn/wht, d=lt grn/blk, egr sol= gry,blk/pink, injector power 1 =pink changes to red, ground =lt blu, injector power 2= pink/blk changes to white, ground= lt green, O2 sensor ppl, throttle position sensor= a=blk, b= dr blu, c= gray, canister purge= dk grn/yel, blk/pnk, let me know if you need more or go to local shop and buy a print out of ECM

Dave

 

Thank you Dave I will put that to work and let you know the outcome. Thanks again.
Dusty

 

Thank you to every who had some input on this car A friend of mine came over last night and with the help of your advice a few special tools of his. We found the problem. We were able to get the grounds that we needed to find in the harness (thanks to Dave AKA- AvantiHall) For the wiring info. It ended up being a bad ECM. My friend Cory (Tool guy) ended up having an ECM out of an old cop car, that he just so happened to bring with him! And wallah! WE HAVE A RUNNING CAR! Thanks again to all that helped out I was so happy that if I still had my right leg I would have danced a jig all around my shop! Dave, I do have one more ? for you. Is there something out there that plugs into the EGR plugin that will fool the ECM into thinking it is still in the car? I'm worried that the ECM will trip the check engine light and send the car into limp home mode being that it has no EGR any more.
Thanks again,
Dusty

 

The thing to do is : 1. Figure out what your going to keep on the car, like factory distributor ( best choice for cheep operation), knock sensor (picks up ping or cheap gas that rattles the pistons, danger Will robinson), EST (electronic spark timing, O2 (Oxygen sensor in exhaust), MAT ( air temperature coming into throttle body), MAP (sensor that sees pressure change under the throttle body, when throttle is opened or closed and engine load), TPS (throttle position sensor, where the throttle is),,, etc.

2. Then have someone burn a CHIP, and turn off everything you don't use!

Dave

 

I have a harness if needed?