I think it's the idle control unit...
 

I have a 1981 380 SEL

Just got the A/C serviced (never used it before)
when I turn it on everything is ok until I put it in Drive, engine shuts off automatically.

Also if I put the car in gear (no A/C on) and turn the steering wheel all the way right/left, also shuts off..

what is wrong?

I have changed:
distributor cap,rotor, spark plugs &wires, ignition coil..
2 fuel injectors, (#1&2 cylinders), fuel filter,
changed engine oil,
engine shocks & engine mounts...
Belts look tightened...

engine also shakes in gear at low rmp, neutral & park OK..

All help appreciated!!!!

http://www.cardomain.com/ride/1722657

I don't know the specifics of your engine, but it sounds like the engine idle speed control is not controlling idle speed in response to various load conditions, such as A/C compressor, PS pump, and torque convertor loads.

Have a good tech check it out before you throw any more $$$ and parts at it.

Best Regards,
Jim

No Idel control unit.
 

I was analyzing the idle speed control and I turn on the vehicle and the rough idle is there.... when I remove the plug from the idle control unit, it still idles the same.. no change...
is there supposed to be a worse change? I only hear sometype of vacuum on the a/c turn on/off when connecting/disconnecting the module...
I am thinking of replacing this b-4 I turn it into someone that's gonna charge me $1500 for a $200 fix.

thanks in advance to all!

HELP, No Idle control Unit?
what I was messing around with were the AC Control unit (temp control) # 000-822-0903
and AC Control Unit (Blower Control) # 000822-1103

found nothing underneath pass, driver or under hood by cowl..