[The Cold War Kid]

These tps have "slots" instead of holes for the mounting screws. Implying that they adjust the mixture. There is yellow paint on the old one.

So, any special way to adjust a new one as it is installed?

[3bears]

following....cause I thougth you could not change them on a 2001..and I have a 2001 so would be good to know

[The Cold War Kid]

Originally Posted by 3bears

following....cause I thougth you could not change them on a 2001..and I have a 2001 so would be good to know

I heard that too. It is available online - rockauto.com has one but it has holes for the screws - not slots. That will NOT work - believe me! I bought an Asian, off ebay. Wasn't cheap...

The adjustment sets the idle speed. Or has that affect - not necessarily because that's what it is supposed to do. I noticed the transmission shifted into third when cold - it didn't before - had to wait for the motor to warm up. So I knew something happened. Though the new one still has two pins that show no continuity to any of the others? Who knows...

I've been around the Toyota block many times. Basic knowledge: RESET THE COMPUTER after ANY repair - even changing plugs.

Disconnect the negative battery terminal. If you like you can remove the little branch wire from the body and physically short the two cables or you can just use a wire. I have an old handle from some basket that's metal and fits nicely. Leave the cables in contact with each other for 2 minutes. This will "suck" all the data stored in the computer out and cause it to load the defaults from it's ROM chip. Basically start it over, from scratch. It would take quite a while to negate the invalid data without a restart. The old data can and WILL cause the repair to seem like it failed! Or, even worse, make it seem new problems have appeared!

Adjusting the position of the tps requires an engine shutdown to register it with the computer. Turning it just a fuzz makes a lot of difference. Initially I set it by the tach - 700 rpm idling, with motor hot. Then I tweaked it to find the "sweet spot."

I drove the truck a few blocks, cut the motor, tweaked the tps, several times. Finally I had it "dialed in." Then a 15 mile run on the freeway, followed by another engine shut down. FINALLY, it began to work properly.

The little truck is ancient, of course. I suspect the motor is not a '01 'cause it has two ordinary fan belts, as opposed to a serpentine, which it should have. But the wiring harness fits it, perfectly. Again - who knows? Maybe the tps can not be changed on an '01 motor... But I don't think that's right. I think they say that because "dialing it in" yourself will, no doubt, affect the pollution output.

[3bears]

Originally Posted by The Cold War Kid

I heard that too. It is available online - rockauto.com has one but it has holes for the screws - not slots. That will NOT work - believe me! I bought an Asian, off ebay. Wasn't cheap...

The adjustment sets the idle speed. Or has that affect - not necessarily because that's what it is supposed to do. I noticed the transmission shifted into third when cold - it didn't before - had to wait for the motor to warm up. So I knew something happened. Though the new one still has two pins that show no continuity to any of the others? Who knows...

I've been around the Toyota block many times. Basic knowledge: RESET THE COMPUTER after ANY repair - even changing plugs.

Disconnect the negative battery terminal. If you like you can remove the little branch wire from the body and physically short the two cables or you can just use a wire. I have an old handle from some basket that's metal and fits nicely. Leave the cables in contact with each other for 2 minutes. This will "suck" all the data stored in the computer out and cause it to load the defaults from it's ROM chip. Basically start it over, from scratch. It would take quite a while to negate the invalid data without a restart. The old data can and WILL cause the repair to seem like it failed! Or, even worse, make it seem new problems have appeared!

Adjusting the position of the tps requires an engine shutdown to register it with the computer. Turning it just a fuzz makes a lot of difference. Initially I set it by the tach - 700 rpm idling, with motor hot. Then I tweaked it to find the "sweet spot."

I drove the truck a few blocks, cut the motor, tweaked the tps, several times. Finally I had it "dialed in." Then a 15 mile run on the freeway, followed by another engine shut down. FINALLY, it began to work properly.

The little truck is ancient, of course. I suspect the motor is not a '01 'cause it has two ordinary fan belts, as opposed to a serpentine, which it should have. But the wiring harness fits it, perfectly. Again - who knows? Maybe the tps can not be changed on an '01 motor... But I don't think that's right. I think they say that because "dialing it in" yourself will, no doubt, affect the pollution output.

interesting and good to know that the TPS can be switched on these later ones. You said that the 2001 should have serpentine belt....my 2001 has the three belts

[brillo_76]

Which engine are we talking about here? The 4 cylinder 3RZ-FE or the 6 cylinder 5vz- fe ? As the 4 runners had either or.

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[The Cold War Kid]

Originally Posted by brillo_76

Which engine are we talking about here? The 4 cylinder 3RZ-FE or the 6 cylinder 5vz- fe ? As the 4 runners had either or.

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3.4 v-6 - see it at the bottom of all my posts .)

[brillo_76]

"The little truck is ancient, of course. I suspect the motor is not a '01 'cause it has two ordinary fan belts, as opposed to a serpentine, which it should have. But the wiring harness fits it, perfectly. Again - who knows? Maybe the tps can not be changed on an '01 motor... But I don't think that's right. I think they say that because "dialing it in" yourself will, no doubt, affect the pollution output."

[Just for Your information].


None of the 3rd gen v6 4runners engines have a serpentine belt.

The throttle bodys of the 01 and 02 are drive by wire. The actual throttle cable is there for emergency. The TPS on those are not able to be changed. Those throttle bodies have steeper motors that control the butterfly instead of the cable.


Several threads exist on how to properly test them and when they need replaced.

I am unaware of anyone that rebullds them as they have a stepper motor in them that controls the butterfly. Stepper motors are not cheap.

Toyota only used 2 engines in them the 4 cylinder and the v6. Well in the US and Canada markets that is.

So unless someone put a v8 or retrofitted another engine in it. It has the 5VZ-FE v6 which is the same block and intake and exhaust manifold across all of them. 01 and 02 have a different throttle body and an integrated abs master cylinder. The previous years 1996 through 2000 had a separate ABS and a throttle body ran by the throttle cable and the early years TPS sensors can be changed.

I changed mine on my 1998.

Hope this helps.

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