 Sticking Throttle Cable, the saga continues ... |
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| vesnyder |
 Mar 21 2006, 07:01 AM
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#1
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Senior Member  Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933  |
I want to thank everyone who has assisted so far in debugging my car in making it road worthy, despite my blunders. The latest is a sticking throttle or over revving engine? I've replaced the throttle and clutch cable and think I've made sure they are clear of each other - several times - but yesterday on a road test the motor surged as I was exiting a freeway to the point of engine damage (I think I escaped anything permanant?). I am not 100% convinced that the cable/pedal is sticking - any chnace that the throttle body is wacked? How about adding a stronger spring? I lubed the throttle body but I am not confident I've found the source of the problem and I've got too much work into this to blow the engine before I get a Summer of driving out of it!!
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| JJ914 |
Mar 21 2006, 07:46 AM
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#2
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Big JJ Group: Members Posts: 90 Joined: 30-December 04 From: Augusta GA Member No.: 3,374 Region Association: None |
Hey,
I had a similar problem with my car, but my cable was bad. Try disconnecting the cable from the pedal and throttle body and see if it slides very easily. At least then you can rule out the cable. While its disco'd you can check the the pedal to make sure its not binding. Good Luck. |
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| olav |
Mar 21 2006, 08:25 AM
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#3
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Senior Member Group: Retired Members Posts: 1,107 Joined: 28-December 02 From: Los Gatos, CA. USA Member No.: 34 Region Association: None |
I had a throttle cable that got bound up. I replaced it but that didn't fix the problem. I also found that the cable seemed to be fine out of the car but when I installed it it had the binding issues.
Finally, I just squirted some liquid lubricant down inside the cable sheath and that fixed my problem. The lubricant was kind of viscous so it would stay put sort of not super runny. Never had the issue again as long as I owned the car. It was a 74 1.8. |
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| vesnyder |
Mar 21 2006, 08:41 AM
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#4
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Senior Member Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933 |
I used the Terry cable which says that you should not use lubricant on the cable because it has a teflon insert and the lubricant just attracts dirt? I did note the new cable did not have a plastic sheath that the old one had?
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| Dr Evil |
Mar 21 2006, 09:09 AM
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#5
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Send me your transmission! Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region 
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Mine stuck once like that. It turned out to be the end of the cable contacted the intake plenum box when at WOT. It acted as a stand to hold the throttle open.
Check the end that protrudes from the hold nut of the throttle body. |
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| Dr Evil |
Mar 21 2006, 09:12 AM
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#6
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Send me your transmission! Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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I, too, added more spring. You can get them at your local auto store in the red packaged parts section.
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| vesnyder |
Mar 21 2006, 09:47 AM
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#7
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Senior Member Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933 |
Dr Evil - I think you may be on to something? Are you talking about the air filter plenum?
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| Dr Evil |
Mar 21 2006, 09:52 AM
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#8
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Send me your transmission! Group: Members Posts: 23,038 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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Mine stuck on the lower part, but that does not rule out the upper air cleaner housing (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) If you move the throttle by hand you will likely accomodate for this, and/or your air filter housing will be removed. If you have someone actuate the pedal inside while you watch the throttle you may find the culprit.
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| goose2 |
Mar 21 2006, 09:56 AM
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#9
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Senior Member Group: Members Posts: 976 Joined: 30-March 05 From: Eugene, Oregon Member No.: 3,847 Region Association: Pacific Northwest |
Throttle stuck wide open on my six once...I got it shut down before it over-revved but it was pretty exciting. It turned out that the return spring was located such that the throttle lever went over center on the spring and held it open. Something else to check.
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| JoeSharp |
Mar 21 2006, 06:13 PM
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#10
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
I've had the throttel cable wraped around the clutch cable and also had the pedal stick on the floor board. Check the TB to make sure it closes correctly(snaps shut). If you have to add a spring something is wrong.
:PERMAGRIN: Joe |
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| Rand |
Mar 21 2006, 06:25 PM
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#11
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Cross Member Group: Members Posts: 7,411 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) And I wouldn't feel good knowing that I was only overriding the problem with extra spring tension. Sounds like something is binding or catching. |
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