Throttle Position Sensor (TPS) on 95 Buick Regal
#1
Junior Member
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Hey guys, it'* me again...
Thank you all for all of your help so far, and any advice you can offer on this current issue.
Car Details:
- 1995 Buick Regal Custom
- GM 3800 Series 1
- 3.8L "L27"
After the latest LIM & UIM issues, I noticed my TPS was sticking. (on a related note, im curious as to if this could be causing the "high idle" issues I've been facing. TLDR: My car idles around 2000 RPM upon starting, and slowly increases.)
I assumed the spring inside the TPS had given up on life. So, while at the salvage yard for other parts, I pulled a TPS from a fantastic looking 95 Buick Regal 3800 3.8 "Limited." The car only had ~70,000 miles, so I figured "what the hell, what can it hurt?"
However, the TPS didn't fit. No worries, I went back and found a few other Regals with low mileage (side note: I found quite a few of these 3800s with low mileage sitting in the salvage yard. I wonder if they went there with easy fixes?). However, while searching I kept running into the same issue: The TPS looks exactly the same, but two plastic ledges inside the TPS connector - presumably there to keep someone from connecting the wrong TPS - are in different locations that the one I pulled off my car.
Here is the TPS on my 95 Buick Custom: My Car'* TPS connector
Here is the TPS on the salvage 95 Buick Regal (and what I found on all other "compatible" models)Limited:
Salvage TPS connector
Any idea why this would be an issue? My first thought is that a previous owner has already replaced the TPS and the connector. However, I can't find any evidence of splicing on the connector - so unless someone reqired the connector and had the patience to route this wire correctly and completely inside of the original wire tubing, i'm starting to doubt it as ever replaced. I figured i'd post here while working on other things to get your thoughts on the matter.
One last question: Does anyone have a useful diagram or reference sheet for all the PED connections on the 3800 series 1? I've search google endlessly, to no avail. I ask because I found a loose connector and cannot for the life of me figure out where it leads. I highly doubt it is something I unplugged during the LIM, as I thoroughly photographed and documented every step of the process.
Here is the PED in question, and where it leads: PED 49 & respective wire lead
Thanks for any help you can offer!
Thank you all for all of your help so far, and any advice you can offer on this current issue.
Car Details:
- 1995 Buick Regal Custom
- GM 3800 Series 1
- 3.8L "L27"
After the latest LIM & UIM issues, I noticed my TPS was sticking. (on a related note, im curious as to if this could be causing the "high idle" issues I've been facing. TLDR: My car idles around 2000 RPM upon starting, and slowly increases.)
I assumed the spring inside the TPS had given up on life. So, while at the salvage yard for other parts, I pulled a TPS from a fantastic looking 95 Buick Regal 3800 3.8 "Limited." The car only had ~70,000 miles, so I figured "what the hell, what can it hurt?"
However, the TPS didn't fit. No worries, I went back and found a few other Regals with low mileage (side note: I found quite a few of these 3800s with low mileage sitting in the salvage yard. I wonder if they went there with easy fixes?). However, while searching I kept running into the same issue: The TPS looks exactly the same, but two plastic ledges inside the TPS connector - presumably there to keep someone from connecting the wrong TPS - are in different locations that the one I pulled off my car.
Here is the TPS on my 95 Buick Custom: My Car'* TPS connector
Here is the TPS on the salvage 95 Buick Regal (and what I found on all other "compatible" models)Limited:
Salvage TPS connector
Any idea why this would be an issue? My first thought is that a previous owner has already replaced the TPS and the connector. However, I can't find any evidence of splicing on the connector - so unless someone reqired the connector and had the patience to route this wire correctly and completely inside of the original wire tubing, i'm starting to doubt it as ever replaced. I figured i'd post here while working on other things to get your thoughts on the matter.
One last question: Does anyone have a useful diagram or reference sheet for all the PED connections on the 3800 series 1? I've search google endlessly, to no avail. I ask because I found a loose connector and cannot for the life of me figure out where it leads. I highly doubt it is something I unplugged during the LIM, as I thoroughly photographed and documented every step of the process.
Here is the PED in question, and where it leads: PED 49 & respective wire lead
Thanks for any help you can offer!
#2
Senior Member
True Car Nut
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I have no idea on the TPS connector. I didn't even realize the holes were keyed, unless it'* because yours is missing the weather seal and that is throwing things off.
Also, my first thought is that plug goes to IAT sensor on the airbox.
Also, my first thought is that plug goes to IAT sensor on the airbox.
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