Question about 1992 Toyota Tercel
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Posted on Jan 02, 2017
SOURCE: idle to low
The idle is electronic, possible causes of this could be the idle air control valve, mass air flow sensor, and air hose from filter. You can verify if there are any leaks in your filter housing with a visual inspection, you can also remove the mass air flow sensor very easily and see if it is clogged with dirt.
Posted on Aug 31, 2009
More than likely the low idle you are experiencing is caused by a dirty IAC valve located right under the throttle body itself. It needs to be cleaned out with carb cleaner. Remove the electrical connector, the two vacuum hoses, and two screws. To put it back, use a little sealant to seal it before screwing it back together but do not get the sealant inside the IAC valve. If this 4 Runner is a V6, you may need to replace the spark plugs if old. Make sure to purchase twin electrode NGK or Denso spark plugs and gap them to .043 with a gapper.
Posted on Jan 31, 2010
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