Question about 1999 Hyundai Accent
If the car is a fuel injected model there are three possible answers.
1/. If the oil is very old it may be affecting the gasses in the exhaust thus causing the Lambda sensor to give incorrect information to the computor-change the engine oil.
2/. Check that the throttle body is clean inside, any tar residue in the body or bypass port can cause hunting.
3/. The coolant temperature sensor may be faulty and giving an incorrect signal to the computor.
Posted on Aug 06, 2008
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Oct 11, 2012 | Cars & Trucks
can be 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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