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Registered User
Join Date: Feb 2002
Location: Chalfont Pa
Posts: 1,503
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Throttle not returning to idle?
When I blip the gas the idle takes a few seconds to return to normal. What could be causing this?
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Registered User
Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
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What kind of 911? Year, intake, etc.
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damn dude you beat me to this question. mine does it to. but not always. i monkeyed with my pedal cluster, i am planning on making sure i didnt run the clutch cable too close to my throttle cable. let's see what the smart guys say...
cliff
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Registered User
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Return spring on throttlle - by the linkage in the engine compartment?
Deceleration valve - you could plug the vacuum line? Many other things too, but this is just my first guesses.
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'76 911 Carrera 3.0 |
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Registered User
Join Date: Jun 2003
Location: Chelmsford, MA
Posts: 872
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My car does that. I bought new bearings to rebuild the pedal cluster as a first resort.
If you reach down and pull the pedal back up, does it go back down right away? Mine does.
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1968 911L 2004 Dodge Dakota SLT Plus |
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yea, i rebuilt my pedal cluster too. i was just thinking i did something wrong.
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Registered
Join Date: Jun 2001
Location: Northern CA
Posts: 464
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Done clutch work lately?
I always seem to get the clutch cable twisted up with the throttle linkage in the tunnel which causes the throttle to stick/hang.....
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Mark '88 Carrera GPW Sunroof Coupe '82 SC Targa (RIP) |
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Registered User
Join Date: Feb 2002
Location: Chalfont Pa
Posts: 1,503
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car is a 1978sc with a three liter
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Registered User
Join Date: Jun 2000
Location: Los Osos, CA
Posts: 101
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Try removing (and plugging) the vacuum line to your de-acceleration valve.
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Graham Archer 83 911SC Cab |
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Did you get the memo?
Join Date: Mar 2003
Location: Wichita, KS
Posts: 29,095
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Just to join the club, I'm having this problem too, I was going to start by cleaning and lubing all the linkage ball joints, any recomendations on the type of grease?
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Matt J. ‘10 E63 AMG, ‘09 SL63 AMG Past: 911T, 911SC, Carrera, 951s, 955, 996s, 987s, 986s, 997s, BMW 5x, C36, C63, XJR, S8, Maserati Coupe, GT500, etc |
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Registered User
Join Date: Nov 2002
Posts: 1,955
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Yep, first suspect should be the decel valve.
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Moderator
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In my case, it was the throttle rod joint on the transmission. Try detaching the rod on the pedal side at the elbow, and moving it (with the car off). If it's stiff and has trouble returning to idle position, you may need to disassemble it and clean it or possibly replace the bushing in there. I lubed mine to little effect from the outside; finally had my mechanic replace the bushing.
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Mark Szabo 1986 911 Targa 3.2 (I will miss you) 1985 Scirocco 8V (I will not miss you) 1986 Dodge B150 Ram Van (I can't believe I got $200 for you) 1987 Escort 5-speed 1.9 RIP |
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Registered User
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What is a deceleration valve? Where is it? Which one is the vacuum line? Is it one of the hoses that's always loose from the shroud? (sorry for the onslaught)
I am also having this problem... fairly small (if you can consider stuck throttle potential.) Returns to normal if I pull up the throttle w/ my foot. Was just considering adding another/stronger return spring but it seems like a band-aid fix. How far do I have to dig in to reach and clean all the linkages? (Are there any crucial hidden ones?) thanks in advance. |
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Registered User
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This will tell you what the decel valve is and where it is located.
http://members.rennlist.com/jimwms/CIS/CIShome.html As for bushing lubrication. Follow the linkages. Pull apart at every junction you can find and make sure nothing's sticky. Also check all your springs to make sure they're in place and pulling properly. It's helpful to have another person to work with you throug this and a good time to make sure you're getting full throttle when you floor the pedal. I wasn't and it made a huge difference after some new bushings and tweaking.
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'76 911 Carrera 3.0 |
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Did you get the memo?
Join Date: Mar 2003
Location: Wichita, KS
Posts: 29,095
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Yeah, but what to use? WD 40, moly grease, what's best? Also, what bushings are there in the throttle linkage? In this case it's on a Webered 70T.
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Matt J. ‘10 E63 AMG, ‘09 SL63 AMG Past: 911T, 911SC, Carrera, 951s, 955, 996s, 987s, 986s, 997s, BMW 5x, C36, C63, XJR, S8, Maserati Coupe, GT500, etc |
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just fixed mine. it was as old skul said. the linkage joint rod coming off the tranny. i pulled mine partially off and lubed it will some silicone grease. fixed!
cliff
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