Madmikeee

Hey all, Looking to fix the bubba'd harness in my 77 and after some discussions with a friend he thinks my best bet is to get a new/used engine wiring harness and replace the taped, tied and mangled mess I have right now. I have looked at other options ie Painless (more like worthless) and other places want me to completely remove my entire harness and ship it to them to make me a brand new one to the tune of $1500.00 :eek: and so far it seems my best bet is to adapt a 92 engine harness to my car's drivetrain and leave the 77's body harness in place as it is in very good condition for it's age.

I am wondering what I am looking at for availability, and cost for a decent used harness, I know a new engine harness from GM would run me about 4 bills and I really do not want to spend that much cash for a new harness just to cut it up.

BTW engine is 92 LT1, and ZF6 trans in a 1977 shark

Opinions?, other ideas?




[Modified by Madmikeee, 12:01 PM 4/26/2004]

Madmikeee

am I not worthy of a response because I drive a C3?? :cry

bogus

:yesnod:

:jester

Check with the salvage yards.

I know there is a harness available... a buddy of mine built an 85 El Camino with an LT1 from an F-Body.

scorp508

Mike, http://www.corvettecentral.com is a good C4 junkyard. They should be able to hook you up. :yesnod:

Also keep in mind that you have a 92 LT1 which means it is Speed Density and has no MAF Sensor. There are other years that went back to MAF setups with those sensors. I forget the specifics, but I think you'll need a 92-94 LT1 harness.

p.s.

If you have a part # check out http://www.gmpartsdirect.com their prices are cheap, but the shipping sometimes is a bit on the high side.


[Modified by scorp508, 1:00 PM 4/27/2004]

luvmy92

I'll have one for sale in a couple of weeks and it'll be brand new...
http://forums.corvetteforum.com/zerothread?id=799965

Mike

Madmikeee

You have IM :cheers:

Madmikeee

And that my friend is the MAIN problem I am having. Everyone carries the setups for the F-body LT1 swap but no one carries one that will work with the corvette LT1. Honestly are the harnesses really all THAT different? I mean I know the heads and cam are different and the tuning is obviously a factor withiin the computer but really , we are talking about a wire bundle, yes it is complex but damn.

luvmy92

Replied to your IM :)

Mike

luvmy92

Just so you know, I called Contemporary and the place in Lousiana, and they both wanted more than the brand new Painless harness.

$260 shipped for a brand new harness... let me know if you are interested. If it doesn't sell here, I will just put it on eBay when we are done with the tuning on the dyno.

Mike

Madmikeee

my main concern is the fact that painless told me I would have to reprogram my Accell ECM to F body specs for their harness to work properly.

Since you all obviously know a HELL of alot more than I do about the modern EFI/DFI engines I don't want to purchase something that is not going to work properly with my setup.

What all would you think I would need to do to make this work with my current setup? SOrry if I am being a little tentative here and maybe even being a little bit overly concerned but I want to make sure I do this right the first time.

luvmy92

Let me see if I can't get CorvetteZ51Racer to look at this thread and add his input. I'm pretty sure this would work for you but am not certain.

Mike

scorp508

Call them back and ask them why. You won't get good answers without good information to provide. Is it the VATS module? Is it something else?

Madmikeee

OMG I totally forgot about the VATS module. THat must be why :banghead: :banghead: :banghead: , Lemme do some more research on this.

Thanks for that kick in the head scorp!!

scorp508

If it is in fact VATS you can just put a bypass module in the car.

Madmikeee

:banghead: :banghead: yup it is due to the VATS setup

From their site "How do I know which computer and computer chip to use?
Painless Wiring TPI and LT-1 harnesses require the use of a ECM PROM (chip) with the GM Vehicle Anti Theft System (VATS) removed from it. VATS used a resistor in the ignition key as a theft deterrent, and if the system saw the wrong resistance in that circuit, the car would not start. Some MAF systems had it, and all MAP TPI and LT-1 systems had it. Piggyback-style chips will not work in these applications unless both the original chip and the piggyback chip both have the VATS removed. All Painless Wiring fuel injection harnesses require the use of an unmodified, specific part number GM computer. The LT-1 ECM is a '92-'93 Camaro ECM #16159278 and no other LT-1 ECM will work with the 60501 harness. This part number usually appears as a service number on the computer itself. GM computers can be purchased through your dealer and at most parts stores. "

well considering the computer is an aftermarket piece, now all I have to do is get the part number and see if it has VATS disabled in it's setup or how they go about the configurations

scorp508

Mike,

I don't , know if Painless assumes that customers do or do not have the ability to burn new chips for their cars. We have the means to burn you a new chip with VATS disabled. It should cost you less than $60 for the adapter hardware & ECM EEPROM chips.

luvmy92

I know for our testing purposes on the dyno, John talked to Craig Moates and he said all we have to do is program to bypass the VATS... not sure what's involved there but John said it won't be a problem.

Mike

scorp508

It is literally a check box you turn off when editing the ECM program. Check it on for VATS to be enabled and check it off to disable it. Burn a new chip with it checked off and no more VATS.

Madmikeee

And therein is the problem, THe accell ECM is the main concern I have. Once I figure that system out I will be home free. But with no experience in that area I am going to be having alot of fun trying to break it :)

luvmy92

That's good to know... and I guess that's what John will be doing.

Mike