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7/25/14 10:58am - Original Message: 'Throttle cable issues'
persico Gold Member
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Long Valley, NJ - USA

Vette(s):
1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack

Joined: 3/21/2007
Posts: 254
I have been having trouble attaching the factory throttle cable to a Holley Street Avenger 4160 carb.  I resorted to purchasing a Holley throttle cable bracket and Lokar cable which looks nice but here's the issue (which really has nothing to do with the aftermarket parts)  I notice that the attachment point for the cable to the pedal assembly  does not seem to line up with the hole in the firewall for the cable when the pedal is all the way up - meaning foot off the gas.  The pedal attachment (where the grommet goes)  is a couple of inches higher than the hole in the firewall which means the cable does not feed through smoothly.  I disassembled the pedal to firewall assembly but it doesn't seem to be more than one way to attach it so I don't think I did anything wrong during reassembly.  Anyone familiar with this issue?  Maybe in the "off the gas position" the pedal grommet attachment point should not rotate all the way up to the firewall?  I'll reattach the actual pedal assembly and look at the height of the pedal next.  I'll try to send picture to better illustrate! 

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Mario
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7/28/14 5:24pm - Reply: 'Re: Throttle cable issues'
persico Gold Member
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Long Valley, NJ - USA

Vette(s):
1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack

Joined: 3/21/2007
Posts: 254
OK Some pictures might be better at showing my concern.
As you can see in this first picture the plastic grommet on the top of the accelerator pedal assembly holds the end of the throttle cable which passes through the silver fitting in the firewall.  In this pic it doesnt look too misaligned, but if I should rotate the pedal all the way to the firewall (the position it will be in when your foot is "off the gas" and the carb throttle linkage spring pulls the throttle closed.  You can see below how mis-aligned it is in the second picture, and this is using the factory pedal assempbly and firewall mounting hole for the cable.  Any idea what I am doing wrong or is this not an issue?




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Mario
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7/28/14 10:03pm - Reply: 'Re: Throttle cable issues'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19454
Mario...the top of pedal(where the cable connects) should NOT be all the way against the firewall when "at rest", or in the normal position. It should be just about where it is in the first pic, and the actual foot part of the pedal should be around 3"(or less) off the floor. I've never actually measured how high the foot pedal is from the floor, so I'm just thinking 3" would be about right...maybe less. If you raise the pedal up until the top part is against the firewall, as in your second pic, you prolly couldn't get your foot on the pedal....it would be too high.....is that making any sense?
The cable position, where it comes thru the firewall hasn't been changed, nor has the actual pedal been changed....all you did was change the cable itself. Now...granted, the cable you got may be longer or shorter than the original cable, which could cause the pedal to be in a different "at rest" position than "normal".....that would be my only thought as to why you are having this difficulty. Did you check the new cable against your old one for the correct length? I realize you have changed carbs, and then had to get some sort of adapter to be able to connect a different cable to it....somewhere in those three items is the problem.
Have you connected the cable to the pedal, to see if it would work at all?


btw...those are really nice pics! Hard to get up in there to get decent shots of that area....kudos for that!

|UPDATED|7/28/2014 8:03:25 PM (AZT)|/UPDATED|


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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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7/29/14 9:17am - Reply: 'Re: Throttle cable issues'
persico Gold Member
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Long Valley, NJ - USA

Vette(s):
1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack

Joined: 3/21/2007
Posts: 254
Adam, thanks.  Guess I jumped the gun with the question but even in the "at rest position" the pedal grommet and hole don't seem to be aligned perfectly and as you said, that geometry has nothing to do with changing the cable or bracket, so I was puzzled.  Was at a show this weekend (Corvettes at the Beach at Sylvan Lake, NY) but believe it or not few C3's and none had their owners nearby or I would have asked to look at the stock setup. I have not actually hooked the cable up so I will do that and see where it rests using the old cable.

Thanks for the kudos but honestly the entire interior including guages and steering column are currently out so the pics were easy!


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Mario
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7/29/14 9:27am - Reply: 'Re: Throttle cable issues'
persico Gold Member
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Long Valley, NJ - USA

Vette(s):
1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack

Joined: 3/21/2007
Posts: 254
persico said: Adam, thanks.  Guess I jumped the gun with the question but even in the "at rest position" the pedal grommet and hole don't seem to be aligned perfectly and as you said, that geometry has nothing to do with changing the cable or bracket, so I was puzzled.  Was at a show this weekend (Corvettes at the Beach at Sylvan Lake, NY) but believe it or not few C3's and none had their owners nearby or I would have asked to look at the stock setup. I have not actually hooked the cable up so I will do that and see where it rests using the old cable.

Thanks for the kudos but honestly the entire interior including guages and steering column are currently out so the pics were easy!


Duh, sorry for addresssing you as "Adam" Joel!

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Mario
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7/29/14 12:25pm - Reply: 'Re: Throttle cable issues'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19454
 LOL No prob...I get that a lot... LOL
I can't really see the actual angle from the cable end to the grommet in the first pic, but it sure looks weird, so it's easy to see how you would be concerned. Of course in the second pic it's totally out of whack...no way that would work at all. With the pedal all the way to the firewall, measure where the foot piece is, and then mash the pedal all the way to the floor.....the "at rest" position will be just about 1/2 of that distance. You can play with the cable end/bracket on the carb end, and tweek the upper arm, where the grommet is to get it to where it is comfortable to drive, but be sure that you are able to get full throttle at the carb with the pedal on the floor.
I've had MANY cable ends pull thru that stinkin little grommet over the years....usually at the worst possible time. I've used zip-ties, coat hangers....even hose clamps to get the dang thing moving again, but it always throws the pedal too high to be comfortable, so just be sure it feels good when you get it all back together, and working. Thumbs Up


and....taking pics like that with the interior out is CHEATING!!! Yer s'posed to be laying in there upside down with yer arms all mangled up, and crap fallin down in yer eyeholes the whole time! LOL LOL

____________________________________
Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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8/1/14 3:00pm - Reply: 'Re: Throttle cable issues'
persico Gold Member
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Long Valley, NJ - USA

Vette(s):
1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack

Joined: 3/21/2007
Posts: 254
"and....taking pics like that with the interior out is CHEATING!!! Yer s'posed to be laying in there upside down with yer arms all mangled up, and crap fallin down in yer eyeholes the whole time! LOL LOL"





Well all I can say is I've paid my dues in that postion, taking out the brake booster BEFORE taking apart the interior, DUH!  And regarding the "full throttle test" that's great advice, it's  why I'm replacing the linkage in the first place.  The Bubba before me had the aftermarket Holley hooked up with some Rube Goldberg combo with the original throttle cable with the casing peeled off up to a certain point and held with a hose clamp!  It din't allow full throttle - although I'm not sure I'm crazy enough to use full throttle on this beast again! The one time I did I tryin to pull out of a parking lot in a hurry I saw my rear end suddenly appear in front of me in a cloud of smoke!Embarrassed (I notice there's no emoticon for scared sh**tless!)  Thanks again I'll let you know how it goes!


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Mario
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8/1/14 9:14pm - Reply: 'Re: Throttle cable issues'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19454
 

LOL Thumbs Up


____________________________________
Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
 Reply Reply  Quote Reply w/Quote
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 Forums -> C3 Fuel, Emission Control, and Exhaust Systems
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