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Old 11-06-2019, 05:04 PM #16
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Mostly the TPS throw a CEL when they start going. I agree with the others. Do a service manual test on that TPS. That is jumping all over the place like it doesn't know what to do.. It wouldn't be the first time a TPS is bad and the CEL isn't being thrown on.
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Old 11-06-2019, 06:10 PM #17
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Quote:
Originally Posted by phattyduck View Post
Based on what I'm seeing there, the truck is in 3rd gear, then when you floor it, it shifts to 4th and oscillates between locked and unlocked torque converter.

First try driving with OD turned off, which will lock out the trans from 4th gear.

My crazy thought is that you have a bad TPS, which is confusing the ECU as to what gear it should be in...

-Charlie
with o/d off truck is running fine.
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Old 11-06-2019, 06:11 PM #18
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Quote:
Originally Posted by brillo_76 View Post
Mostly the TPS throw a CEL when they start going. I agree with the others. Do a service manual test on that TPS. That is jumping all over the place like it doesn't know what to do.. It wouldn't be the first time a TPS is bad and the CEL isn't being thrown on.
gonna order a new tps tonight. pretty sure its got the original on there
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Old 11-06-2019, 06:12 PM #19
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Quote:
Originally Posted by Bad Luck View Post
It sounds and looks like a tps issue. What year and trim is your 4Runner?
2000 highlander sr5.
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Old 11-06-2019, 06:19 PM #20
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Quote:
Originally Posted by rich dog View Post
2000 highlander sr5.
Lucky for you the tps can be replaced separately from the throttle body for your vehicle. Part number is 89452-35020 for a new throttle position sensor.

Edit: If you need to replace it or decide to throw a part at it.
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Old 11-06-2019, 06:45 PM #21
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Quote:
Originally Posted by rich dog View Post
gonna order a new tps tonight. pretty sure its got the original on there
It would be best to TEST the TPS before just throwing parts at it. Sometimes aftermarket parts will cause more problems than they solve. Also, you need a multimeter to adjust the new TPS after install, I believe...

-Charlie
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Old 11-06-2019, 07:04 PM #22
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Quote:
Originally Posted by phattyduck View Post
It would be best to TEST the TPS before just throwing parts at it. Sometimes aftermarket parts will cause more problems than they solve. Also, you need a multimeter to adjust the new TPS after install, I believe...

-Charlie
Like Charlie said TEST the TPS sensor. I said best to Test the TPS sensor as it may not be the problem and you be throwing money out of the window.
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Old 11-09-2019, 05:27 PM #23
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update: swapped in an oreilly tps sensor and seems to have fixed the rpm drop. Thanks for all the help and suggestions!you guys are great!
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Old 11-09-2019, 05:53 PM #24
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Do you have a kick down cable and is it hooked up? TPS, TCC & park/neutral switch seem like possibilities as well.
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