Hello all. First post here. My girlfriend was coming home last night on the freeway, went to pass a car and the throttle stuck wide open. She was able to slow the car down and safely get off the freeway. 2005 Santa Fe AWD v6
I went to pick her up and drive her car home. When I got there I noticed that the pedal was extremely difficult to press down. I am 6'8", 260 lbs and I found it hard to press. I drove it home and was able to get it to stick but only at full throttle. I just reached down and pulled the pedal up and engine speed returned to normal.
About 6 months ago we took it to the dealership and they replaced the entire throttle body with a new one. Since she bought the car it has stalled while driving at speed and when coming up to red lights. She has taken it to them countless times for the same problem under warranty with them only to say they can't find anything wrong with it. So when it did it the last time she had just over 100k miles on it but they replaced it for free after the service manager saw that she had been there for the same problem countless times.
Point being I checked the butterfly for any debris, dirt or grime and found nothing. Very clean and it moved smoothly by hand.
I plugged my code reader in and found no codes. So I then removed the pedal assembly and found it to be moving freely and smoothly. Removed the airbox and intake tube to get access to the TPS. I unbolted the TPS mount, not the tps itself from the mount. I know it has to be in the correct spot for it to be calibrated right so I did NOT mess with that adjustment. The TPS assembly with spring rotated smoothly like it should. I then checked the cable itself and it was also smooth and did not bind.
So I put everything back together.
Once back together I checked the pedal and it felt normal, no sticking or anything. Don't know what I did?
Went for a test drive and the pedal operated normally. However, when I take my foot off of the pedal the engine continues at that same speed for about a second and then idles down. So I came home and took it apart again. This time I had someone press the pedal so I could watch the return spring on the TPS. It returned quickly and normally and showed no signs of why there was a delay in the engine slowing down. So mechanically from the pedal to the TPS there appears to be nothing wrong with the linkage operation.
Put it back together and now throttle operation is normal until about halfway and the after that there is a delay in returning to normal idle. Do I take it apart again and see if it fixes the last little bit? (joke) Seems to be intermittent and not continuous.
So I think that it is electrical. But doesn't explain why the pedal was hard to push last night.
Is there a possibility that something inside the TPS broke and is why the pedal was hard to press and when I removed it the piece moved out of the way and allows movement but messed up the reading? I want to take it apart but want more info before I do.
Has anyone had any similar issues? I have been searching through this forum since last night and have found a few similar stalling issues but nothing exact.
Someone also posted that there was a way to adjust/reset the TPS itself but was unable to find that thread or any info regarding it. I found a post where there is some general information on what voltages should be found on the TPS but no instructions as to what wires and how to test.
I have been working on cars/Harleys/dirt bikes/machines and everything in between for 20 years and have no problem tackling this but wanted to find some info first. Anyone know of a place to download a manual or a good detailed service manual I could get my hands on?
Thanks for your time reading this and I hope someone can point me in the right direction.
As a last resort I will take it to the dealer but after dealing with their incompetence and BS I would like to tackle it myself.
I went to pick her up and drive her car home. When I got there I noticed that the pedal was extremely difficult to press down. I am 6'8", 260 lbs and I found it hard to press. I drove it home and was able to get it to stick but only at full throttle. I just reached down and pulled the pedal up and engine speed returned to normal.
About 6 months ago we took it to the dealership and they replaced the entire throttle body with a new one. Since she bought the car it has stalled while driving at speed and when coming up to red lights. She has taken it to them countless times for the same problem under warranty with them only to say they can't find anything wrong with it. So when it did it the last time she had just over 100k miles on it but they replaced it for free after the service manager saw that she had been there for the same problem countless times.
Point being I checked the butterfly for any debris, dirt or grime and found nothing. Very clean and it moved smoothly by hand.
I plugged my code reader in and found no codes. So I then removed the pedal assembly and found it to be moving freely and smoothly. Removed the airbox and intake tube to get access to the TPS. I unbolted the TPS mount, not the tps itself from the mount. I know it has to be in the correct spot for it to be calibrated right so I did NOT mess with that adjustment. The TPS assembly with spring rotated smoothly like it should. I then checked the cable itself and it was also smooth and did not bind.
So I put everything back together.
Once back together I checked the pedal and it felt normal, no sticking or anything. Don't know what I did?
Went for a test drive and the pedal operated normally. However, when I take my foot off of the pedal the engine continues at that same speed for about a second and then idles down. So I came home and took it apart again. This time I had someone press the pedal so I could watch the return spring on the TPS. It returned quickly and normally and showed no signs of why there was a delay in the engine slowing down. So mechanically from the pedal to the TPS there appears to be nothing wrong with the linkage operation.
Put it back together and now throttle operation is normal until about halfway and the after that there is a delay in returning to normal idle. Do I take it apart again and see if it fixes the last little bit? (joke) Seems to be intermittent and not continuous.
So I think that it is electrical. But doesn't explain why the pedal was hard to push last night.
Is there a possibility that something inside the TPS broke and is why the pedal was hard to press and when I removed it the piece moved out of the way and allows movement but messed up the reading? I want to take it apart but want more info before I do.
Has anyone had any similar issues? I have been searching through this forum since last night and have found a few similar stalling issues but nothing exact.
Someone also posted that there was a way to adjust/reset the TPS itself but was unable to find that thread or any info regarding it. I found a post where there is some general information on what voltages should be found on the TPS but no instructions as to what wires and how to test.
I have been working on cars/Harleys/dirt bikes/machines and everything in between for 20 years and have no problem tackling this but wanted to find some info first. Anyone know of a place to download a manual or a good detailed service manual I could get my hands on?
Thanks for your time reading this and I hope someone can point me in the right direction.
As a last resort I will take it to the dealer but after dealing with their incompetence and BS I would like to tackle it myself.