Question about 1990 Toyota Pickup
You should remove inspect and clean the idle control valve on the throttle body. This can become clogged over time, or the motor itself can become worn and may need replacing.
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
You have extra air leaking into the intake manifold that mimicks a throttle that is open further than it really is. Check for vacuum leaks.
Posted on Feb 28, 2009
SOURCE: 1993 toyota 4x4 idle problem
sounds like your throttle positioning sensor is not set right so i would undo the two phillips heads that hold it and turn it till the idle doesnt fluctuate should be turned most of the way to the front of the truck. Also check your idle screw that throttle body could be set different.
Posted on Sep 23, 2009
Could be a dirty throttle body or low coolant, bad coolant sensor, throttle sensor, or idle speed motor
Posted on Jan 15, 2010
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