2000 regal runs rough and stalls after warming up

SOURCE: 1991 buick regal starting and running problem

Sounds like your car is overheating. If you have a temp gauge it should show that. If you just have an idiot light, by the time it comes on it's already too hot to operate. AFTER the car is cooled down, open the radiator cap to see how much coolant has been lost. Chances are there is alot missing. Add WATER (no sense in adding coolant if it's going to leak out) and idle the car at home. Look underneath as it warms up to find where the leak is.

honeymokey

• 3113 Answers
• Posted on Jul 12, 2009

SOURCE: my 2000 buick regal started very roughly it took

You need to replace the intake plenum. Are you losing coolant too?.

SOURCE: My daughters 1990 buick regal custom has started

First, have your daughter listen for vacuum leaks (young females generally have the best high frequency hearing) They will sound like a very high pitched whistle. Next, look for vacuum hoses that are damaged and leaking. Next, clean the throttle body. Remove the hose that goes from the air cleaner to the throttle body. Hold the throttle plate open and spray some throttle body cleaner (available at an auto parts store) in and scrub with an old toothbrush -- don't forget the top. There are other things, but these are the easy, common, obvious first tries.

SOURCE: 2000 LeSabre starts but runs very rough and stalls. After

My 2002 Lesabre (app 115000 miles) started something like this. Also the loose gas cap had been coming on for quite a while. I replaced the vacuum line from the air intake to the fuel sensor. It is under the engine cover (twist off the oil filler to remove the cover). There are two hoses together that come of the air intake. The small one goes to the top of the engine. The other goes across the front and makes a 180 turn back to the sensor. Chances are the 180 piece is cracked. It all comes from the dealer as one unit. $25
Seems to have fixed my problems. So if your car is running a little rough. Shutters under load. If the gas cap loose is coming on or probably a number of symptoms this might be the answer. I would replace this item. A cheap try.

SOURCE: 2000 buick regal 3.8 SC fuel pressure drops to

but what the pressure it should be at