Engine check light is on

You have a OBD2 Set up. OBD1 won't read it. OBD1 stopped in 95.

When it stalls out, if it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. A spark tester from the auto store doesn't cost much, you can carry it in your glove box. If the engine is hot, wear gloves.

With temp issues check the coolant temp sensor. How long since a tune-up, I'd also want to check fuel pressure. Check for applicable trouble codes. Your obd1, you should be able to check codes, yourself. You use a jumper wire between the A & B terminals at the data link connector, usually lower edge of dash between steering column and driver door. Turn key just till the dash lights come on, no further. The mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes.

A/c compressor.

This could be caused by a faulty MAF sensor or an O2 sensor. Does the Check engine light come on when this happens?

http://thirdgenchat.org/ecm_codes.html

Umm there is no engine idle screw on those type of vehicles.. If you are having problems with your idle then check the TPS(Throttle Position Sensor)sensor which is usually located on top of the intake..

i belive this is carburated and it sounds like it needs adjusted but replace the fuel filter if it is in the carb they clog up easy.

Well, in my 1989 Olds 88, the oil filter is just above the right swingarm for the wheel. It's an interesting reach from underneath, and the oil drips directly onto the frame of the car, but that's where the filter should be.

I believe they use the same 3800 (3.8L V6) engine up through 1997 or 1998...so you should be able to find it there. Hope that helps!

Caused damage to the Engine. You will need an Overhaul at this Point before it gets Worse and More Expensive.

If everything else checks out Ok in the ignition system (electrical) and if the engine and transmission turn freely,that sound like you might have starter drag.Check to see if you have good connections at the starter.I know its new but check your battery for 12 volts,good connections,ect.