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It could be the IAC module that sits next to the throttle body. It controls your idle and is non-adjustable.Try cleaning toyr throttle body system first, if tht doesn't work it will need to be replaced. Good luck, Mike

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17y ago
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15y ago

check coolant level clean throttle pate if you have ac the condenser will cause an idle change about once every 20 seconds

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16y ago

It's almost always a vacuum leak, but it can also be a sticking throttle assembly.

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Q: What causes an abnormally high idle in 1988 Jeep Cherokee?
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