SS350scott

hi everyone,

i have been doing a complete restoration on my 1988 camaro, as well as swaping a 1996 impala ss lt1 w/ 4l60E tranny. motor is in the car and wired up, however the transmission is not and i currently have the old v6 and the impala wiring harnesses in it. so my questions are: where do i get a complete wiring harness to fit a 1996 lt1 in a 1988 camaro, and the car will only turn over, not actually start. i was wondering if the tranny sensors and what not are throwing off the ecm or if the chip in the key is the reason it will not start because i do not have the impala key. please help and please let me know if it is something different or if anyone else has crossed these issues.

thanks a lot,

Chase

Sojer

well it is reading a vac leak the 4.3 sucks up less air that a 5.7. So all the extra air is like a massive leak so it will never run. U need a lt1 ecu from a ss imp. That's what I was told. But I'm sure u need a lt1 ecu

SS350scott

well im told i have a 5.7 ecu.
anything else you could think of?

thanks for the help!

five7kid

iTrader: (14)

Do you have the LT1 PCM? Or, a 350 ECM from a 3rd gen?

I'm assuming the LT1 PCM, but what you're saying is confusing.

The easiest way to handle VATS is to have it programmed out of the PCM.

SS350scott

i bought a 1996 lt1 that was originally in an impala ss. to my knowledge, it is the original lt1 ecm

Z28 MeTaL HeAd

Its not working because you cant just take an LT1 harness and plug it into a 3rd gen. It doesnt work that way. You need a CONVERSION harness. You need to make this by combining the LT1 engine harness with the factory 3rd gen harness.


Read pockets thread on how to do this yourself:
https://www.thirdgen.org/forums/ltx-...p-3rd-gen.html

SS350scott

well i do have both harnesses in the car but ill take a look at your link

thanks!

cerhart

I Think we all need a little more info on what u have done up to this point what wiring is hooked up/if you've mated the harnesses and yes vats will hold u up definitely a priority before first start