id replace the gas pedal assy (inc. gas pedal position sensor)
Stuck Throttle
Thread Starter
Team Owner
Joined: Nov 2006
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From: Long Island New York
Stuck Throttle
I went for a drive this morning. It was cold out maybe 30 degrees. I drove about a half mile then gave it about 1/4 throttle and relesed the pedal. The rev climbed up to about 4000 rpm a stayed there! I tried goosing the pedal to make it return to idle. I didnt work. I then applied the brakes and the car pulled against them(A6).I then pulled off on the shoulder and put it in Park and shut it down. I checked that nothing was holding the pedal down and it was clear. I started the car and the engine roared to 4000 rpm again! I shut it down again and gave it a couple of minutes and started again. This time the idle returned to normal. I drove off carefully and it seemed fine for the rest of the day. I tried to make it reaccur but could not. I'll call my dealer to have them look at it ASAP but I'm curious if anyone has heard of this? The first thing I thought of was frozen linkage somewhere but the car has seen cold temps before. Any ideas?
Le Mans Master
Joined: Dec 2001
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From: St. Peters MO
C7 of Year Finalist (stock) 2019
2018 C7 of Year Finalist
I went for a drive this morning. It was cold out maybe 30 degrees. I drove about a half mile then gave it about 1/4 throttle and relesed the pedal. The rev climbed up to about 4000 rpm a stayed there! I tried goosing the pedal to make it return to idle. I didnt work. I then applied the brakes and the car pulled against them(A6).I then pulled off on the shoulder and put it in Park and shut it down. I checked that nothing was holding the pedal down and it was clear. I started the car and the engine roared to 4000 rpm again! I shut it down again and gave it a couple of minutes and started again. This time the idle returned to normal. I drove off carefully and it seemed fine for the rest of the day. I tried to make it reaccur but could not. I'll call my dealer to have them look at it ASAP but I'm curious if anyone has heard of this? The first thing I thought of was frozen linkage somewhere but the car has seen cold temps before. Any ideas?
Team Owner
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From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
I don't know if this will help, but after the dealer, if nothing is found, maybe a battery disconnect/reconnect. It does sound like the old frozen linkage problem. Tell us what they find.
Safety Car
Joined: Sep 2008
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From: Location: Location: kAnSaS
its a fly by wire throttle. meaning no mechanical linkage at all. The pedal has a sensor on it that the computer "see's" then it sends a signal to the throttle motor to open the throttle plate butterfly.
Could be a sensor issue, computer quad driver issue, throttle plate really dirty and binding, throttle motor defective. Or of course misc. wire issues.
First thing i would do is take a look inside the throttle body for gunk around the plate causing it to stick. But when that happens it almost always sets off the Check engine light. If not that then depending on your diagnosis you may need to take it in. good luck,paul
Could be a sensor issue, computer quad driver issue, throttle plate really dirty and binding, throttle motor defective. Or of course misc. wire issues.
First thing i would do is take a look inside the throttle body for gunk around the plate causing it to stick. But when that happens it almost always sets off the Check engine light. If not that then depending on your diagnosis you may need to take it in. good luck,paul
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Brett Foote
Instructor
Joined: Oct 2006
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From: SC
I wonder if it could be ice on the throttle plate. It happens on aircraft and they have a special intake heater to avoid the problem. Generally happens at outside air temps slightly above or below freezing (+-10*F). It usually doesn't happen on fuel injection systems, since there is no fuel near the throttle plate.
It still could happen, due to the reduced pressure behind the throttle causing lower air temperature and moisture to condense.
Does the problem go away after the engine is warmed up and heat is starting to come from the radiator? A "yes" to that question would make icing a possibility.
Very dangerous!
It still could happen, due to the reduced pressure behind the throttle causing lower air temperature and moisture to condense.
Does the problem go away after the engine is warmed up and heat is starting to come from the radiator? A "yes" to that question would make icing a possibility.
Very dangerous!
Safety Car
Joined: Oct 2001
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From: Coldwater MI
Pro
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From: los Angeles, California
St. Jude Donor '08
I went for a drive this morning. It was cold out maybe 30 degrees. I drove about a half mile then gave it about 1/4 throttle and relesed the pedal. The rev climbed up to about 4000 rpm a stayed there! I tried goosing the pedal to make it return to idle. I didnt work. I then applied the brakes and the car pulled against them(A6).I then pulled off on the shoulder and put it in Park and shut it down. I checked that nothing was holding the pedal down and it was clear. I started the car and the engine roared to 4000 rpm again! I shut it down again and gave it a couple of minutes and started again. This time the idle returned to normal. I drove off carefully and it seemed fine for the rest of the day. I tried to make it reaccur but could not. I'll call my dealer to have them look at it ASAP but I'm curious if anyone has heard of this? The first thing I thought of was frozen linkage somewhere but the car has seen cold temps before. Any ideas?
Move out to Sunny California
Safety Car
Joined: Jun 2008
Posts: 4,610
Likes: 427
From: USA
As an LEO I have the same problem in my 03 Ford Crown Vic only when it's cold. I know it's a different car, but sounds like the same issue. Usually when I "goose" it a couple times, it comes back to normal, but keep us posted so I can look into it.
Safety Car
Joined: Sep 2008
Posts: 4,296
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From: Location: Location: kAnSaS
bad, i would try changing out your temp. sensor. The one thats for the computer.
Melting Slicks
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From: Central Coast CA
State taxes and DMV fees are going up 1/1/09 and the State budget will be broke 2/09.