Rock90rs

iTrader: (3)

About A year ago I picked up an 88 corvette TPI less wireing. Today I purchased a Wireing harness from an 87 GTA. I wanted to go MAP, but the fact that i cant afford a TPI harness to begin with and got the MAF harness for only $17.00,..well you get what I mean.

I know I still need the ECM and the MAF sensor, But what about my existing relays and such? will they be compatable with the new harness? any futher suggestions, ideas, or comments are greatly appreciated!

RCR

Most (if not all) of your relays and sensors should work with the older harness. One thing, off the top of my head, I know you'll need is a MAF burnoff relay. I would need to look at my books for more info. You could also try rewiring the harness for MAP if that's the way you want to go.
Also, for your info, I have an ECM from an '88 TPI 350 and MAF sensor taking up space in the garage. I think they're good, but I've never used either. Email me if you're interested.

Rock90rs

iTrader: (3)

What is a burnoff relay? And where is it located on the car? Im going back TODAY to get more parts off of the car that the harness came out of, i could get the relay as well.

RCR

Check your email Rock.

Bob

Kevin91Z

iTrader: (1)

Dont forget the 87 wire harness will have the AC on the drivers side, and alternator on the passenger side, along with having V-belt accessories, while the 88 setup is serpentine. The wire for the sensors will be in the wrong place.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

scotty d

the burnoff relay is the same relay used for the fans. get 2 because you need 1 to power up the burnoff circuit and one that actually sends the relay power to the MAF. they are cheap and you can usually snag some at the salvage yard. they are the 2 closest to the fender and located on the drivers side fire wall.

Rock90rs

iTrader: (3)

Damn,..I knew that it wasnt serpentine, but i never realized they were on opposite sides....Hmmm..more problems.

Rock90rs

iTrader: (3)

I just thought of something,...doesent the altinator run off of the accesory harness, and not the engine harness?

84IROC

Yes, the Alt. does run to a seperate harness but the AC compressor has one wire that will go to the ECM. One other thing, The ECM triggers the electric fans as well, which fan does your engine have, mechanical, electrical,single or dual? Is it the same system as the donor car?

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"84Z28/'91 305TPI comp cam flowmaster TB coolant bypass/shutoff valve to heater core MAT relocated Ram-Air(home-made) gutted air-box IROC ground effects/wheels GY245/50's 700R4 superior shift kit/ corvette servo(excellent shift kit BTW) Rebuilt engine and transplanted it myself. Love this engine!
LOW performance people should drive low performance vehicles!

ogg__666

does the fan part really matter for your car to run cuz i just got an 87 harness and computer for tpi so i can swap out the tbi in my car and my fan wire dont get any power ?!?!?!?!

Tuned Performance

iTrader: (92)

Um wake up the dead, this is a 12 year old post. If you having fan wiring issues maybe you should start your own post or look at the wiring schematics.

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

BlackenedBird

iTrader: (5)

I love when I see Members tell others to Search, then when they do & post in an old post that relates to their question for the answer......They are told that the Post is dead & to go start a new thread!

Tuned Performance

iTrader: (92)

ogg__666

i thought that part of what the site was about was helping ppl and i assumed that someone on this thread had some useful info for me guess i was wrong sorry buddy !!

fireburdluvr85

the fan circuit goes thru the c207 harness on that harness where as the tbi harness it is in the firewall or c100 harness. i did the swap myself 2 yrs ago and ran the fan wire from the fuse box to the connector next to the computer or c207. search the threads in lt/ls swaps and youll find all the info you need. good luck

ogg__666

thanks for the info a lil more helpfull !!!