Question about 1999 Jeep Grand Cherokee

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How do you set the throttle position sensor on 1999 jeep grand cherokee 4.0 litre

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That sensor is not adjustable. It slides onto the throttle shaft and is screwed in place to the throttle body. Idle speed is controlled by the computer by adjusting air flow through the idle air control valve. If the idle is too high (you did not say) first clean the throttle body bore and plate, then if necessary remove the control valve, cleaning out the passage in the throttle body and carefully cleaning the valve itself, without turning the plunger. If that does not help, you will need to do electrical testing on that and other components to find out what's going on as well as checking all vacuum hoses attached to the engine for cracks or leaks.

Posted on Nov 12, 2010

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Posted on Jan 02, 2017

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