My mom's car runs good until it gets to running temp and when she come to a stop the motor start to shake and it stalls, so you have to wait for a few minutes start ang until the next stop help

Sounds like your coolant level might be low. At highway speed you probably have enough coolant and with the air passing thru the radiator keeps the temp down, but at idle not so much. Or depending whether you have a belt drive or electric fan. Belt driven, could need a new belt.

get the fault codes read

Sounds like the mass air flow sensor or the air intake temperature sensor. Sometimes just wiping out the throttle body/air intake can make all the difference

Good Luck and Happy Motoring

Check for cracked head gasket. Is the oil a funny color? Check for cracked block.

Have fuel pressure checked when it starts to misfire/stall and driving down the road at normal speeds.
Not unusual for fuel pump to run at proper pressure when cool, but lose pressure when warmed up. If it's only running bad when off accelerator and stopping or turning and runs down the highway good, remove and clean AIS/IAC motor. ( idle speed motor ) Once cleaned, if it runs better for a while then starts to act up again, replace it.

check the fuel pressure regulator

for the cheapest TEMPORARY solution get some fuel injector cleaner and get on the gas fo about 5 mile at like 100 - 120 miles an hour thats what idid to mine last week hasnt wanted to die out since. good luck.

lisalavin,

You said,

My 1990 Buick century stalls out when in park after idling for a minute or two and stalls out when brake is applied. last night it did this every time I had to stop or make a slow turn it also started shaking a bit but if i released gas a little bit it would stop. i thought the shaking might be the cvu joint as it needs to be replaced but it started doing it on straight aways and hills also but would still stop shaking if gas was eased up on. Closer to home when it was stalling the only way I could get it to stay running while I put it in drive was to have one foot on the brake and the other on the gas. Is this a matter of changing the fuel filter or is it something more complicated?

It can be one of many things causing this!
1. Low idle, needs to be raised
2. A vacuum leak, needs to be diagnosed.
3 The choke, if it's when it's cold or the engine is cold and not up to running temp.

4.But, I'll l bet it's a idle sensor

Or last and probably NOT a broken baffle in the cat converter!
this usually happens more often not just with the stop but even when driving!

Bless you,
huuum
You really need a good honest HANDS on diagnoses!

please give me a god rating before you sign off

ignition control module shuts car off when gets hot and will start after it cools on a 94 its under coilpack easy fix