Likely caused by a bad filter that allows air to circulate in the engine, also could mean you have bad pistons, alternator, converter, or perhaps a misfire in the engine, if not then there could be something else wrong in the engine
Best option is to have your car dianosed
Your engine probably has a vacuum leak
The air conditioning (A/C) compressor can impact the idling of a car engine by adding extra load to the engine when it is engaged. This additional load can cause the engine to idle lower than normal, potentially leading to rough idling or stalling if the engine struggles to maintain the required RPMs. Conversely, when the A/C is turned off, the engine can idle more smoothly and efficiently, as it no longer has to compensate for the compressor's demand. Proper engine management systems typically adjust idle speed to accommodate the compressor's load, helping to maintain stable idling.
Replace the Idle Air Control Valve only about $50. This would cause funny idling and stalling out.
Try replacing the idle air control valve (IAC)
You dont you replace the timing control module
Your 1987 Chevy Beretta may be stalling when idling due to several potential issues, such as a clogged fuel filter, a failing fuel pump, or a dirty air filter. Additionally, problems with the idle air control valve or vacuum leaks can disrupt the air-fuel mixture, leading to stalling. It's also worth checking the ignition system, including spark plugs and wires, as they can affect engine performance at idle. A thorough diagnostic can help pinpoint the exact cause.
sounds like idling too low udjust it in front of whre linkage hooks to srew it in further
A car that is stopped with the engine running.
Is it carburated? If so I'd check that out, might need to be retuned or something.
Most of the time rough running and stalling is due to vacuum leaks. There is more of a load on the engine when it is in gear, so that lends itself to stalling out. When I look for vacuum leaks, I have the engine idling (maybe you need a friend to keep it from stalling) and then spray carburetor cleaner around the various hoses & gaskets that could be leaking. Any increase in the idle speed would be an indicator that you have a leak in that area.
A miss, black smoke and a strong gas smell. Also, bad acceleration, rough idling, and stalling.
if you don't use it enough the fuel goes 'stale' and gums up the carburetter