Car keeps dying and idling rough.....why?

In some of the older cars, there is a modulator in the transmission. It runs on the vacuum created by the engine. If the modulator goes bad, and it sucks all the vacuum from the engine, it will run rough. Look in to that and see if it helps you out. As far as the oil light, that Marvel mystery oil may have done some real "housekeeping" inside your engine. Try running some good 10W 30 motor oil (not synthetic) without any additives. See how it goes.

pop your radiator cap and fill, let the car run with the cap off, if you see bubbles, the head gasket is bad, also pop a spark plug out of each side, if it's brown like chocolate its fine if its black you could have a bad injector, also to rebuild your throttle body with fuel pressure regulator is about $40

My car doing the same thing I have 32,000miles on car what is the problem?

We had exact same problem. Took forever to find it. Ended up being a crack in the rubber tube in the fuel pump. Small crack but every time we put a load on it, it would die. Like you we replaced everything else unnecessarily. At idle was fine but when pit a load on it it couldn't get enough gas because of cracked hose

I have a 1981 curve caprice with 83,something thousand miles every time I started up the engine be revving High like someone pushing the gas some times when I cut it off. It will backfired still can't find out the problem what it is then when I drive it hesitate and stall when I push the gas when I try to make it go up to 45 mph would could that be

Try this before you replace any more parts; it could be the fuel pressure regulator in the Throttle body.

This happened on my 1992. Chevy Caprice 5.0.

I have a Caprice 88 classic 305 eng.with a Rochester quadrajet carbo. he start and drive but some time at the stoplights the engine begin to slowdown and stops I have put a new destributor inn but now he stopos evry time I put im in a gear D or R