Car cuts off when the air conditioning is turned on

Do the procedure below, do it exactly as discribed or it will not work.
Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

If I had to wager a guess, I would bet on the idle speed control motor

From the depths if H3LL (no year nor anycar stated>? )
here is your answer piggybacker
1: engine power so weak (due to misfire) it stalls engine. with AC on, ( I say not but is possible, i can demo it)
2: AC compressor seizing or near,
3: idle controls on engine borked. (clean the ISC valve)
4: scan it, you see errors, address them.win.


here is the ISC test , A/C off
1: hot engine, 180f is hot not 150f,
2: rpm is now at spec, (you look it up) 800 guess
3: the ISC job is to regulate idle speeds,
Idle speed controller, = ISC
the PCM does that, the ISC is a slave of the PCM
the PCM brain has the speeds stored in memory
and is in control at all times hot,its called a SERVO system. (engineering term)
4: now with RPM at spec, if not fix that first.
we put loads on the engine, each will cause the ISC
to open more and old idle to SPEC.
HL headlamps on
heater blower to HIGH those 2 alone are near 25amps load, rpm holds
if car is automatic, you never said nor did the hyghjackker.

shift to DRIVE
this is huge load
and RPM is regulated to spec, 800 or no changes
if all these test pass its a go,

the engine that misfires all the above is useless
fix MISFIRing engine first.