Check the air filter is not clogged. Get a garage to read the fault codes and fix it.
An engine usually has a higher idle speed when the ac is running. If the high speed idle does not operate then the ac will cause the engine to stall.
the engine to stall and surge at idle
Usually, a jeep's engine stalls in idle mode because of a battery power fault or because there is no gas. However, it is common for any car to stall when it has not been running for a period of time and the engine is cold.
This sounds like an idle problem. Does the service engine light come on before the engine stalls? If it does it should post a code. Knowing what that code is could lead to a more accurate assessment of the problem. Does the engine idle ok before you put the car in gear? Does the engine restart and idle ok after the stall? There are multiple possible causes for the stall. The IAC, idle air controller, could simply be dirty and not delivering enough air for the engine to run. If the MAF, mass air flow sensor, if faulty or dirty that might cause the engine to stall. If the Oxygen sensor is faulty that could cause a stall and generally poor running as well. It may be possible that if the TPS, throttle position sensor, is faulty that could cause the engine to stall at idle speed. If you have found out what the problem is I would be interested to know for future reference.
possible bad TPS, IAC, or ECT sensors
Had a Jeep in the shop here with that problem last week and it turned out to be low fuel pressure. Try running a fuel pressure test. The Jeep would idle ok but when you tried to accelerate the engine would stall.
An idle motor controls the idle-like when U turn on the AC,It will raise the RPM's so the engine doesn't stall. Idle motors are used on computer cars & instead of a screw adjustment.
If its a turbo car it will stall if the blow off valve is not shutting properly as the pressure drop is too much for the engine to keep turning, same with lpg when you idle the pressure in the engine drops and it will stall you can correct this by changing the timing
Could be a vacuum leak. The year and engine info would help us help you.
Why would it stall or almost stall in Reverse but not in Drive? How long since it's received a tune-up and thorough check-up? How is the compression?
Your car will idle high until the engine begins to warm. You could set the idle to be a bit lower, but that may cause the engine to stall out when it's cold out. The engine should begin to lower the RPMs when it is warmed up.
Yes, that is one of many possibilities.