Hi, my 1996 volvo 850 se automatic, will start and run for about 20mins then jus stall and will not restart untill it has cooled down. what could this be and how might I fix it???

check the radio fuse for burn

Fuel injection relay. It is located under the hood inside the fuse box. It is either red or green in color. It is one of the larger relays. This is classic symptom of these things going bad. The heat causes the relay to swell and not engage properly. They die out every couple of years. Usually the car will start again after it cools down.

The power stage module,can do this on you vehicle after a hot restart

Hello and welcome to FixYa!

Looks like that the ignition coil is faulty. When the ignition coil is faulty the car tends to stall when engine is warmed up. I strongly suggest that you replace the ignition coil to resolve the problem. Not a big deal, it's common on all vehicle.

Hope this helps and thank you for using FixYa! Have a good one!

when the generator quits the car will run until the battery is drained then it will stop. You need the constant recharging to keep running. Sounds like you will need an alternator. Seek a volvo shop and get estimates.

my m reg 850 auto volvo starts ut the revs drop and when i engage drive it stalls

my volvo won't run on idle, it keeps coughing and shutting down.

check your plugs plug wires ignition coils and ignition amplifiers and cam sensor.change fuel filter if it has not been changed in a while.if its partially clogged will cause stalling problems.

I would check that the auxilliary drive belt that runs the alternator and probably the water pump hasn't just broken, causing the engine to overheat and the battery to run flat. Just a suggestion, hope it helps.

Look on the distributor. There is a module on it that, when too hot, will cause miss/stall/no re-start situations.