Adjust idle up adjust up untill no problem idling while in gear use 2 people some one in car braking
SOURCE: 2000 pont. grand am dies at stops and low idle
I just got done with this same problem. Check a small looped vacuum hose just behind the mass air flow sensor which is attached to the air filter housing. the hose will be toward the plenom on the right side next to a blue connector. They have a tendency of getting soft.
SOURCE: Rough idle only when in gear.
The Air Idle Control Valve (IAC) may be bad or dirty with carbon build up. Check for loose wire, remove and try to spraying it with throttle body cleaner to clean the carbon out and dry it with a hair dryer before installing.
The other thing to look for to is stuck EGR valve. same process as the (IAC) as to cleaning it too. If both are beyond cleaning then replace it.
You can go to Auto Zone and have the car scanned for any DTC codes which would indicate any problems with the (IAC) and EGR's performance.
The other thing to that would make the engine shake at low RPM's is bad spark plug and wire or low engine compression, but that would give you problems through out the whole engine's performance.
Good luck and hope this helps, Start with the (IAC) and EGR as to cleaning and scanning the engine.
SOURCE: 1998 Pontiac Bonneville SE 3.8L Backfires/ Sputters
sounds like the ignition module is going bad.
SOURCE: While driving my 2006 torrent the ac works fine
the condenser cooling fan(s) are not working. Usually, it will be a fuse, the relay, or a bad fan motor itself. It cools while your car is moving due to ram air flow through the condenser....
Here are the common cause of surges, stalls at stops, slow idle speed, erratic idle, 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
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