After swapping a 4 or 6 cylinder for a V8, what was needed to get your a/c working again? I just finished swapping to a V8 from a 3.1. I have reconnected all the a/c lines, but am sure that I may have to change some of the wiring to get my a/c to work.

Thanks for any input...

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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP

 

What did you do for/to the engine harness? The same controls work for the A/C whether V6 or V8. The only rewiring I had to do was to change the electrical switch on the heater control and the harness through the firewall because it has a line to the electric radiator fan, which the V6 didn't have. I put the complete V8 harness in, so that simplified it for me. But, the wires themselves were the same.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/94.6 @ 5800' Bandimere.

 

I used a carbed motor to replace the 6, so I did not add the V8 harness. I am sure that there are some connectors that will prevent the a.c. from working. The more I study the shop manual the more I feel I will have to trick the ECM. I may have to do things, like ground out the coolant sensor connection, since I no longer have one...

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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP