Question about Toyota Corolla
You need to clean the throttle valve and the idle speed airbypass valve, they get full of gunk from the fuel and cause this problem, after cleaning them disconnect the battery for a few minutes and then drive a few days the problem should go away. You clean these with the engine running at high idle speed, use carb spray and spray into the intake air hose, use the whole can.
Posted on Oct 06, 2008
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Posted on Jan 02, 2017
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stalling issue at low speeds
is commonly caused by a dirty automatic idle speed control valve and
throttle valve. Buy a can of throttle valve 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
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