AC issue in 3800 swap (Page 1/1)
HamiltonLambo SEP 30, 11:48 PM
AC question for 3800 swap.

I am looking to reconnect and attempt to start the AC in my car with 3800 engine swapped in by PO.

This is the AC module in the car.
The compressor is Delphi 10341812 and comes up as intended for 2004-2009 BUICK ALLURE, LACROSSE, IMPALA, GRAND PRIX.

The discharge and suction ports are different sizes and hose are being customized by Chuck in Florida.

I was told the 3800 engine is series 3.
I am new to this and learning as I go. [img]http://images.fieroforum.com/userimages /HamiltonLambo/50F58BFB-387C-40DD-B446-284F813FD8D1.jpeg[/img]
Question:
How do I verify if the AC has the correct setup to run properly?
Dennis LaGrua OCT 01, 07:32 AM
In addition to conversion hoses that join the compressor to the manifold connection by the firewall you will need a 10MM switch port on the high pressure hose (the smaller of the two) for the A/C pressure switch that controls the system. The pressure switch screws on to that port connection and you must have it. IIRC the hoses used are the #8 and #10 barrier hoses. The clutch is contolled by a relay and the pressure switch gets wired into the PCM the A/C request signal to the dashboard switch. This is the short explanation.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

HamiltonLambo OCT 01, 10:14 AM
Hi Dennis- thank you so much for your response and expert insight. It helps me to start verifying some of those details.

I currently have this black module that states “AC”.
How do I verify if that module is correct and needs to be revised to send signal to the clutch and compressor?

If that module is incorrect can I buy a series 3
Module from an old car that with a 38000 series 3 motor (ie from scrap yard)?

I’m trying to figure out the PCM side of the equation.
Dennis LaGrua OCT 02, 07:24 AM
The electronics are simple. I have no idea what that black module is as we have never used it on a swap. The AC request signal is simply hooked up to your dash switch, the pressure switch on the high side line is hooked up to the PCM and the clutch relay is wired to control the clutch. You do not need anything else. I'll try to look up the connections and post them here later on.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

olejoedad OCT 02, 08:08 AM
The cycling switch on the separator needs to be bypassed as well.

Front compartment, silver capsule on wall below windshield.
Cut the blue and green wires from the plug and connect them together.
HamiltonLambo OCT 02, 10:18 PM


Is this the component?
HamiltonLambo OCT 02, 11:36 PM
It looks like the black box that states "AC" on the passenger side is either for cruise control and/o sub amp for Radio.
olejoedad OCT 03, 08:27 AM
Your last picture is the "blue dingy thingy" and has nothing to do with the A/C system.

Look in the front 'trunk', on the rear wall for a large silver 'capsule' - that is the separator.