Question about 1997 Chevrolet Astro
My 1997 chev astrovan has a 4.3 and automatic and air. when driving along perfectly norman it will just suddently shut down and not start again for a few minuts then it will start and run like nothing happened untill the next time it decides to shut down.
Electrical control imbalance
or a ground not grounding properly
these are first things i would look at
the next is the levels of coolant in system and how bad the canister is clogged it has a filter in it
then the mechanical the bearings are getting ready to lock up
Posted on Dec 06, 2008
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Posted on Jan 02, 2017
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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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