Question about Cars & Trucks
PLS WHY DOES MY VW SHARAN 1998 MODEL GO OFF SOMETIMES WHEN I SLOW DOWN IN A TRAFFIC HOLD UP OR WHEN I AM NEGOTIATING A BEND, AND IT COMES ON NORMALLY WHEN I RE SWITCH IT ON?
You might have to check the operation and condition of your idle control valve. These become clogged over time or wear out which causes uneven idle and stalling when operating under low revs.
Posted on Nov 07, 2012
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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 but always run a OBD2 fault code as well as the cleaning procedure. 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. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.
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