You did'nt specify what year,engine size, or model. but what you describe,is a common poblem.the engine idle control sensor may be bad.is your check engine light "on"? this may be why the lights on. but the light may not be on at all, and the idle control sensor may still be bad. it starts fine, then idles fine for awhile,until you put it into gear to drive it,then it sputters,or dies. or else you start it and then put it into drive on the clear road,then give it full throttle gas on the floor,it takes off fine and runs great,until you come to stop sign or red light,then it dies? suspect a bad idle control sensor 1st then suspect clogged fuel injectors. which can be cleaned easily by adding sea foam,or lucas fuel injector cleaner to your fuel tank. no service fees due. thank you for choosing fixya.com. we always look forward to assisting you in your needs,automotive,or just about anything you need assistance with,fixya.com can assist you with! and again,thank you for choosing fixya.com!
Engine stall or RPM fluctuates
at idle.
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
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