Stuck throttle please help.
Thread Starter
Advanced
Joined: Jun 2021
Posts: 70
Likes: 23
From: SE PA
Stuck throttle please help.
1993, automatic, stock as a rock.
Scary day, was on my way home accelerating up a hill. Car just... Kept accelerating. I threw it in nuetral to step on the brakes and stop. When I put it in nuetral the rpms went to the moon, as in redline. My foot was nowhere near the go-pedal. The dash went full christmas tree lights everywhere. I shut the car off and stuck it in park (automatic)
I got stopped in a bad place (uphill blind curve) so I was determined to get off that spot. Popped the hood - the throttle body lever (what the cable attaches to) was unsurprisingly not at the default position. I pushed it closed.
Restarted the car. It seemed fine. No lights. Normal idle rpms. So I did what was probably not the best idea but it worked - I just barely tapped the gas so it started (put into D of course) accelerating slowly. I then rode the brakes the whole way home.
Once home I was able to take a look. Throttle body springs closed fully no issues. However the cable from the throttle body to the (idiotic) asr thing seems slack. But I don't know what baseline is as I've never messed with the witchcraft that is the asr.
Any advice or ideas much appreciated.
Scary day, was on my way home accelerating up a hill. Car just... Kept accelerating. I threw it in nuetral to step on the brakes and stop. When I put it in nuetral the rpms went to the moon, as in redline. My foot was nowhere near the go-pedal. The dash went full christmas tree lights everywhere. I shut the car off and stuck it in park (automatic)
I got stopped in a bad place (uphill blind curve) so I was determined to get off that spot. Popped the hood - the throttle body lever (what the cable attaches to) was unsurprisingly not at the default position. I pushed it closed.
Restarted the car. It seemed fine. No lights. Normal idle rpms. So I did what was probably not the best idea but it worked - I just barely tapped the gas so it started (put into D of course) accelerating slowly. I then rode the brakes the whole way home.
Once home I was able to take a look. Throttle body springs closed fully no issues. However the cable from the throttle body to the (idiotic) asr thing seems slack. But I don't know what baseline is as I've never messed with the witchcraft that is the asr.
Any advice or ideas much appreciated.
Drifting
Joined: Sep 2022
Posts: 1,486
Likes: 395
From: Liberty, SC
2023 C4 of the Year Finalist - Unmodified
I don't have an ASR, can't help you with that. But, while you wait for someone smarter on it to come along I would suggest that you verify your floormat didn't get moved and cause the stick. You could have even moved it back getting out of the car and it looks normal now.
Melting Slicks
Joined: May 2014
Posts: 2,895
Likes: 592
From: New Port Richey FL
Many times in my days at the Dealership I would get this complaint, most of the time it was the Pedal Stuck on the Mat.
So start there after that see if pedal is free, it's a very basic system a fork a cable a fulcrum a few cams on the ASR and throttle body
So start there after that see if pedal is free, it's a very basic system a fork a cable a fulcrum a few cams on the ASR and throttle body
Last edited by s carter; Apr 3, 2025 at 12:53 PM.
Melting Slicks
Joined: May 2014
Posts: 2,895
Likes: 592
From: New Port Richey FL
Either way you need make sure all the cable sections are free and and properly routed. The cables pass a few cams and at rest shouldn't be under real tension and as mentioned throttle plates need inspection.
Thread Starter
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Joined: Jun 2021
Posts: 70
Likes: 23
From: SE PA
In removing the throttle body I noticed the tps looks like a it got hit by a rock (or more likely I dropped a wrench on it at some point). The plastic is mildly cracked. Could TPS be a culprit? I didn't think the TPS on its own could 'stick the throttle'.
I took another look at the ASR cams with the covers off. I found a piece of wood or rock. tiny pebble sized. It was jammed into the cam that has the cruise control cable attached. Could that be a culprit?
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Melting Slicks
Joined: May 2014
Posts: 2,895
Likes: 592
From: New Port Richey FL
took another look at the ASR cams with the covers off. I found a piece of wood or rock. tiny pebble sized. It was jammed into the cam that has the cruise control cable attached. Could that be a culprit?
It definitely gets put on a Dam good reason list, if all is clean and moving as should be, Drive and see
It definitely gets put on a Dam good reason list, if all is clean and moving as should be, Drive and see
Thread Starter
Advanced
Joined: Jun 2021
Posts: 70
Likes: 23
From: SE PA
I hate the asr it isn't clear how it operates and what it controls. I get that it was advanced for 1993 but the thing is like the worst aspects of drive by wire and cable drive. Okay off my soap box.
Race Director
Joined: Sep 2001
Posts: 14,682
Likes: 753
From: NEwhere Ohio
1993 6spd here
Make sure a nut or bolt isnt wedged behind the gas pedal pivot
I had a similar experience when I changed my power booster and dropped a nut - and couldnt find it.
i gave up looking for it and used a replacement nut.
turns out it was wedged behind my gas pedal pivot and caused it to stick WOT
Make sure a nut or bolt isnt wedged behind the gas pedal pivot
I had a similar experience when I changed my power booster and dropped a nut - and couldnt find it.
i gave up looking for it and used a replacement nut.
turns out it was wedged behind my gas pedal pivot and caused it to stick WOT
Thread Starter
Advanced
Joined: Jun 2021
Posts: 70
Likes: 23
From: SE PA
Okay unsatisfying update.
It is back together. And the throttle appears to be working normally....but other than removing the tiny pebble I've got no reason why the thing got stuck in the first place.
It is back together. And the throttle appears to be working normally....but other than removing the tiny pebble I've got no reason why the thing got stuck in the first place.