 Throttle return spring, to weak to close intake completely |
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| Arno914 |
 Apr 14 2021, 03:52 AM
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#1
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Member  Group: Members Posts: 233 Joined: 13-May 20 From: near Frankfurt, Germany Member No.: 24,260 Region Association: Germany 
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After installing new bushings in the pedal cluster the engine idles too high. Reason is that the throttle body return spring seems a bit too weak to fully close the intake on my 1971/4. (The pedal moves freely, but now with a bit more friction due to less play and some grease.)
A Little push with the finger and idle is okay. Is there any possibility to add a second spring like on the later cars? Or should I just install a heavier spring to solve this issue? Any comments on this will be appreciated. Greetings, Arno |
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| wonkipop |
Apr 14 2021, 04:07 AM
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#2
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Advanced Member Group: Members Posts: 4,238 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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you only changed one thing mate.
sounds like its sticking before it can pull right back/ i don't know if you can lube the bushings a bit. years ago when i converted mine to rhd i had a similar problem briefly. but it soon settled down. maybe take it out on the autobahn and give it a bit of florian schneider and see if it comes good with a bit of pedal action. (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/beerchug.gif) |
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| Frank S |
Apr 14 2021, 04:37 AM
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#3
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Member Group: Members Posts: 135 Joined: 15-April 15 From: Wiesbaden, Germany Member No.: 18,632 Region Association: Germany
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Are you 100% sure you didn't twist the throttle cable around the clutch cable inside the center tunnel?
I would check that first. |
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| bdstone914 |
Apr 14 2021, 03:21 PM
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#4
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bdstone914 Group: Members Posts: 4,508 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Also check the rubber gas pedal. It acts as a spring too. If it is mushy at the bottom it has lisy the spring effect. If the cables are crossed depressing the clutch will accelerat3 the engine. Pull the cover plate at the front of the tunnel and look in with a mirror and light.
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| JamesM |
Apr 14 2021, 03:30 PM
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#5
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Senior Member Group: Members Posts: 1,888 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(bdstone914 @ Apr 14 2021, 01:21 PM)  Also check the rubber gas pedal. It acts as a spring too. If it is mushy at the bottom it has lisy the spring effect. If the cables are crossed depressing the clutch will accelerat3 the engine. Pull the cover plate at the front of the tunnel and look in with a mirror and light. (IMG:style_emoticons/default/agree.gif) Had more than one car that had throttle return issues due to the gas pedal itself If it is still pliable as stated the rubber helps with the return however there is another failure mode as well in that there is a metal hinge inside the rubber at the base of the pedal, this (like everything else on the car) rusts out overtime and causes the pedal to bind. |
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| jim_hoyland |
Apr 14 2021, 05:03 PM
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#6
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Get that VIN ? Group: Members Posts: 9,255 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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I had a similar issue; turned out the moving parts at the throttle body needed a shot of lubricant. Still apply about every 6 months... (IMG:style_emoticons/default/smile.gif)
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| Arno914 |
Apr 15 2021, 01:44 AM
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#7
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Member Group: Members Posts: 233 Joined: 13-May 20 From: near Frankfurt, Germany Member No.: 24,260 Region Association: Germany
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Hello all,
thank you for your replies. I checked the cable, no collision with the clutch cable. The mounts inside the tunnel are good (picture). I suppose it is the pedal, together with the cable beeing a bit too tight after fitment of the new bushings (the gas pedal bushings where all gone). I will reajust the cable end at the throttle body to give it some free play and recheck. Arno (IMG:http://www.914world.com/bbs2/uploads_offsite/up.picr.de-24260-1618472645.1.jpg) |
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| VaccaRabite |
Apr 15 2021, 07:15 AM
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#8
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En Garde! Group: Admin Posts: 13,420 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
If you give the cable some free play, make sure the pedal stop on the board is correct or you will never be able to get wide open throttle.
Zach |
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