92 buick PA , runs good, but when it get a little warmer outside , i will drive it for 3o to 40 min home work stop at a the store and then it will not start, turns over, and after 10 to 20 min it will start, and then while im driving home it stalls, the i wait 15 mins or so and it starts. any ideas ...thanks

Personally I woulod get rid of any van,I wouldn't take
a brand new on for free

I think you have you know we can't guess at much & you
most like have the start of a head gasket issue

The transaxles on those are the worst ever made,the failure
rate is real bad

Have it diagnosed & don't get put any money into it

It's a van,15 years old,Ford Product with issues

You got nothing going there

you need a transmission fluid and filter changed.because if filter stopped up.transmission fluid little thicker in cold climate make it hard circulate through filter.when engine and fluid get warmer fluid get thinner where it can circulate through filter cause transmission to shift correctly.

I'm not sure if your car is OBD1 or OBD2 for code readers, but disconnecting the POSITIVE battery terminal for a couple minutes should reset the computer. If the light comes back on then you need to get the codes read. If you live in the US then you can get the codes read for free at O'Reilly's or AutoZone. Go from there. also most auto parts stores sell smaller held help models for around $100, you can use yourself. then type in "92 Buick Century codes" on Google and you will be able to find a site that will give you the problem for that number. Hope this helps.

Have an OBII scan done (fault scan) Any good parts store or shop can do it for you and most will do it free. The scan will identify what is troubling your car - bad sensor, connection etc... I wouldn't drive it far or long because you can do more damage driving it "as is"

Next time you stop, go to a close parts store and have them pull the codes. Could be that you didn,t tighten the gas cap enough. this would be an EVAP code

thermostat sounds stuck causing car to overheat

I would check the fuel pressure first. On a 91 Pa it should be somewhere between 40 and 45 psi.

Crank sensor. Next time it does this spray some water on it and see if it cranks. Its by the crankshaft pulley towards front of car.

is your check engine light on,and is there any codes?

Check the harmonic balancer