Throttle Position Sensor

[spoonito]

Ok, I've been spending the last few weeks trying to sort out all the problems with the car. This is the last issue I have at the moment... I despreately need help on this one. I need to switch out the TPS sensor on my 2001 V8. The OBD II reader I borrowed from a friend is only showing 40% throttle when I floor it. I ALREADY checked and adjusted the pedal travel and made sure the throttle linkage opens/closes fully and no wires are in the way. I thought the car was running in limp mode, but I got all of that sorted out (I think) as the car is not giving me any codes. I am running K&N filters and Johan's ECU upgrade. I need to know:

1. Where exactly the TPS is located.

2. How easy it is to switch out or adjust. Is this something I can do myself, or will I have to take it to the dealership?

3. Any how-to guides for this. The TPS guide in the Tech section is for the 4 cylinder motor and it's obviously not in the same location.

4. Any other relevant info I may need...

Thanks!

[outtamyway]

Ok, I've been spending the last few weeks trying to sort out all the problems with the car. This is the last issue I have at the moment... I despreately need help on this one. I need to switch out the TPS sensor on my 2001 V8. The OBD II reader I borrowed from a friend is only showing 40% throttle when I floor it. I ALREADY checked and adjusted the pedal travel and made sure the throttle linkage opens/closes fully and no wires are in the way. I thought the car was running in limp mode, but I got all of that sorted out (I think) as the car is not giving me any codes. I am running K&N filters and Johan's ECU upgrade. I need to know:

1. Where exactly the TPS is located.

2. How easy it is to switch out or adjust. Is this something I can do myself, or will I have to take it to the dealership?

3. Any how-to guides for this. The TPS guide in the Tech section is for the 4 cylinder motor and it's obviously not in the same location.

4. Any other relevant info I may need...

Thanks!

From the parts list illustration it appears to be under the plenum on the right rear. The P/N is A918E0005H it's description is "Throttle position switch (TPS)" See attached illustration (item #10). I have an '01 V8 and it wasn't visible on the exterior of the engine. There was a post by Mark Pfeffer that described the exact proceedure to remove the plenum, but I can't remember if it was on this forum or the Yahoo group.

Update: Just did a search on this forum and it was a response on June 16th, 2006 on a topic of "Idle control valve IACV picture???". Gotta love this digital world!

Edited May 20, 2007 by outtamyway

[spoonito]

Thanks for All your Help!!!

Wow... Just read the post you were talking about. Sounds very complicated... May be a whole weekend project for me. Well, I'll have to order the TPS on Monday.

[spoonito]

Another question...

Do you ave to take the throttle body apart to get the TPS sensor off. I got the bolts off and the connector off... But it seems like it's connected to the spring system inside the throttle body. Help is appreciated.

[Guest Troy Halliday]

The TPS is quite a simple bit of kit. It basicaly works by sending a varying current to the ecu. It is usualy locked in place by two bolts. The shaft thay goes through your Throttle Boddies butterflies has a flat side to it that your lever arm and TPS locates on. I do not have the figures to hand at the moment but with throtle closed you should get a reading of about 0.5v-0.7v and wide open should be around 5v. I have not checked on these figures as yet but it should give you a starting point before you remove it. to adjust it you simply slaken of the screws and rotate it untl you get the correct voltage.

Hope that helps but if not I will try to explain it better.

[spoonito]

Definately helps... But in the case where it is fouled up, how easy is it to take off and replace it with a new sensor?

The TPS is quite a simple bit of kit. It basicaly works by sending a varying current to the ecu. It is usualy locked in place by two bolts. The shaft thay goes through your Throttle Boddies butterflies has a flat side to it that your lever arm and TPS locates on. I do not have the figures to hand at the moment but with throtle closed you should get a reading of about 0.5v-0.7v and wide open should be around 5v. I have not checked on these figures as yet but it should give you a starting point before you remove it. to adjust it you simply slaken of the screws and rotate it untl you get the correct voltage.

Hope that helps but if not I will try to explain it better.

[spoonito]

Ok, so I just tried every pin combination for the three pins and every reading is reading ZERO (closed and open position). I hope Im doing it correctly... But since I believe it's fouled up these readings would confirm that. And how would I know if it's the TPS, the wire harness or the ECU itself that is not working correctly.

Edited May 23, 2007 by spoonito

[spoonito]

Anyone know how much a throttle position sensor is? I've been calling around and no one has one or they say they can't get one. I did get one quote of over $300, and even then he didn't know if he could get it. I just want to know if this at least in the ball park figure...

Thanks