Symptoms of a bad TPS on a 3.4L?
#1
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Symptoms of a bad TPS on a 3.4L?
Just looking for some help with diagnosing a slight problem I'm starting to experience with my 4Runner.
For about a year now, the idle is not always where it should be. Occasionally, I'll place the transmission in park after a drive (engine at normal operating temp) and the idle will be way too high. A blip to the throttle and it drops down to where it should be.
It hasn't bothered me enough to fix it but now when the engine is cold there is abnormal hesitation. I'm guessing the two symptoms are related and am wondering if a throttle position sensor sounds like the culprit to you guys.
For about a year now, the idle is not always where it should be. Occasionally, I'll place the transmission in park after a drive (engine at normal operating temp) and the idle will be way too high. A blip to the throttle and it drops down to where it should be.
It hasn't bothered me enough to fix it but now when the engine is cold there is abnormal hesitation. I'm guessing the two symptoms are related and am wondering if a throttle position sensor sounds like the culprit to you guys.
#3
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Originally Posted by 98_YOTA
Try cleaning your throttle body and throttle body plate. You can check your sensor by checking its Ohm readings. good luck
#5
Originally Posted by TStango
Just looking for some help with diagnosing a slight problem I'm starting to experience with my 4Runner.
For about a year now, the idle is not always where it should be. Occasionally, I'll place the transmission in park after a drive (engine at normal operating temp) and the idle will be way too high. A blip to the throttle and it drops down to where it should be.
It hasn't bothered me enough to fix it but now when the engine is cold there is abnormal hesitation. I'm guessing the two symptoms are related and am wondering if a throttle position sensor sounds like the culprit to you guys.
For about a year now, the idle is not always where it should be. Occasionally, I'll place the transmission in park after a drive (engine at normal operating temp) and the idle will be way too high. A blip to the throttle and it drops down to where it should be.
It hasn't bothered me enough to fix it but now when the engine is cold there is abnormal hesitation. I'm guessing the two symptoms are related and am wondering if a throttle position sensor sounds like the culprit to you guys.
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i just got the same problem today with a CEL PO120. my question is how do i start to check what is wrong on a 3.4l engine. ive seen 4 crawlers website i've even seen the FSM for the tacoma but the engine configs are different than a 4runner. anyone with a 3rd gen have this problem and what exactly did you do? how would you check the TPS with a volt meter. pics are helpful. sorry to hi jack but i saw so many TPS started but none helped.
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#9
Originally Posted by Lone4runner
i just got the same problem today with a CEL PO120. my question is how do i start to check what is wrong on a 3.4l engine. ive seen 4 crawlers website i've even seen the FSM for the tacoma but the engine configs are different than a 4runner. anyone with a 3rd gen have this problem and what exactly did you do? how would you check the TPS with a volt meter. pics are helpful. sorry to hi jack but i saw so many TPS started but none helped.
Download the procedure off the TIS website if you can't figure it out. $10 day use fee.
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