You may have oil in the pan but that does not mean you have oil to the lifters, rods, etc. It sounds as if the oil pump has gone bad and not enough pressure to keep the lifters filled. To try an easy solution, change the oil filter. There have been occasions where the filter plugged up, there is a bypass to let oil through, but it is not the same as a good filter. If the pump is good it will fill the new filter in 30 seconds or so.
SOURCE: 1988 buick regal stalls and restarts stalls and restarts
Sounds like a relay or coil failing.
To proceed you would need to find out if you are loosing spark to the plugs or fuel pressure to the injectors when it won't start.
SOURCE: 1990 Buick Regal 3.1 has rough idle, hesitates and dies when accelerating.
A lot of new parts! Have a compression test done to gauge the engine's internal condition, and go from there. If compression is good on all 6 cylinders, scan for trouble codes. The compression test may find your problem, something like an exhaust valve burned or not seating properly.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
105 views
Usually answered in minutes!
×