ParkerTPIz

iTrader: (6)

I am in the process of completing a TPI swap in my 1990 rs and i am having an issue with the fuel pump circuit not functioning.

THE FACTS:

-The car is a 1990 Camaro rs and came with a 305 TBI auto.

-The engine and wiring all came out of an 87 Trans Am Gta, and it is a 350 MAF TPI auto setup.

-It has all new sensors

-All of my relays are in working condition

-All of the sensors and plugs has been appropriately placed

-The fuel pump has been replaced to an 87 TPI pump (it has been tested and works fine)

-The Car wiring worked perfect with the last engine harness

-The Trans Am motor and Harness had no issues.

-The Trans Am motor blew and i had the motor professionally rebuilt. I then proceeded to swap the setup into the 90 rs because the 305 tbi blew also

THE ISSUE:

-Something is wrong with the fuel pump circuit.

-Everything else has been tested for power and ground and works correctly

-The sensors and plugs have all been checked and rechecked based on appropriate diagrams

-The pump will only turn on if it is powered with a jump wire.

The main issue is the fuel pump does not turn on when the key is turned to the on position. I need for the pump to turn on and function correctly.

Where could my problem possibly be? Could it be because i put an 87 harness in a 90 car? Thus causing a connection problem at the bulk head?

I have ran out of options and ideas and i could really use some help. Thank You all.

bouncin_hooptie

When I put my 88 TPI engine (from an IROC-Z) into my 92 RS I ran into the same problem. I had to surf around to SEVERAL dealerships until I found one that carried a manual with the pinouts for the C100 block (on the firewall) for both vehicles. I had to repin several wires in that, then I had to cut a yellow wire on the ECM that lead power to ground and fried my accessory fuse everytime I turned the key. After that everything worked fine!

I hope this helped!

ParkerTPIz

iTrader: (6)

dude, that helps out a bunch. is there any chance that u have copies of the 2 different pin outs? that would save my ***.

thanks,
Brandon

ParkerTPIz

iTrader: (6)

also what is the name of the tool used to repin the wires?

bouncin_hooptie

It's been 5 years since I've done that. So I don't think I have those papers anymore. I will dig through some things, but even if I did, they might not match what you have. If my memory is accurate, the tools I used were a precision flat head screw driver and a thick paper clip. Sounds odd... but it worked. There is a plastic retainer clip in there, just push it over with the screw driver, then sometimes I had to push the pin out from the opposite side with the paper clip. As I said before this was 5 years ago, but that's what I recall doing to it to get the pins out. The hardest part was driving from dealership to dealership trying to find the c100 wiring diagrams. But I found what I needed in one day. I think I went to 3 or 4 places and had to wait forever for someone to find the time to leaf through the old books.

Good luck!

---I'm assuming you already swapped the ECM into the rs---

ParkerTPIz

iTrader: (6)

ok awesome. thank you very much. and yessir the 87 tpi ecm is in the rs. everything has been checked, replaced and tested. new motor, trans, brakes, exhaust and the only thing that is stopping it from running is this one damn wiring issue...

thanks again, and just in case u find those papers could u let me know. (just as a back up for me)

bouncin_hooptie

I'm pretty sure my papers are long gone. I should have saved them anyway because I have a similar project coming up... oh well. I suppose I'll do it the same way I did last time.

Glad I could help. again, good luck.

ParkerTPIz

iTrader: (6)

check this out.

bottom of page

http://www.austinthirdgen.org/index.php?pid=19

bouncin_hooptie

wow! Thank you for sharing this! I'm going to print out everything that pertains to my cars and save it.