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90 Renix high idle

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Old 12-19-2014, 01:25 AM
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Default 90 Renix high idle

High idle still ,on my 1990 4.0 in line 6cyl. Larado ...new iac valve , new tps, cleaned throttle body with carb cleaner. But once u warm it up the idle spikes to 1500-2000 rpm... and wants to take off on its own when u let off breaks...as any advice ? Thanks
Old 12-19-2014, 06:35 AM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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Originally Posted by cbilek
High idle still ,on my 1990 4.0 in line 6cyl. Larado ...new iac valve , new tps, cleaned throttle body with carb cleaner. But once u warm it up the idle spikes to 1500-2000 rpm... and wants to take off on its own when u let off breaks...as any advice ? Thanks
Did you ADJUST the new TPS?

Click on the pink link below and go to Tip 8.

That said, you really should do Tips 1,3,4, and 5 just to be sure they's not the root cause of this.
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