Need help!!!!!!!!!!!!!!!!!!
 

Quite the delema.So my 87 supra started to die out on me while i was driving. I found that there was oil on top of the spark plugs so i took the oil out and put the No. 3 cyl head cover/gasket from Toyota. i also changed the spark plug wires and spark plugs and the fuel filter. I double checked everything and made sure all the hoses were connected and everything. So as soon as i finished i took the car for a spin and it ran great!!! then as soon as i turned the A/C on the died on me.

So i found that as the RPMs were low the compressor would work the engine too hard and it would die. So i figured something was wrong with the ac compressor like there was not enough oil in to or too much. so informed my mother not to turn the ac. So my mother took the car to work the next day and she turned the a/c on as she was driving on the freeway. Then all of the sudden the engine was missfiring/backfiring. Im pretty sure its not the head gasket cause the oil looks fine and the exhaust if fine as well. So I am completley stumped. NEED some help. Appreciate any help. THANKS.

It almost sounds like it's have a power failure. Is it turbo?

nope not turbo.

I would try not using the a/c for a whole day and see how it acts it may be the compressor seizing up when you turn it on. I would also have someone turn it on when you have the hood open and see how the compressor reacts does it slow down and seem the belt is just rubbing across the pulley? And then turn it off when you notice the engine about to stall and see if the engine clears up.