Throttle return linkage for LT-1
Thread Starter
Racer
Joined: Aug 2000
Posts: 426
Likes: 0
Throttle return linkage for LT-1
It's been a LONG time since I've posted on this forum, glad to see it's still here!
I need some help trying to figure out why my throttle occasionally gets stuck. This is on a '72, pretty much stock and trying to keep it that way. Does this look right to you guys?
I need some help trying to figure out why my throttle occasionally gets stuck. This is on a '72, pretty much stock and trying to keep it that way. Does this look right to you guys?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,117
From: Crossville TN
Is it possible that the carb is not accurately centered on the mounting studs? I've seen carb throttle plates bind with the insulator gasket between the carb and intake, if the carb/gasket/intake are not well aligned.
Last edited by 7T1vette; Aug 6, 2017 at 12:23 PM.
Team Owner
Joined: Jan 2008
Posts: 30,894
Likes: 1,189
From: chicago
return spring is too big,i thought it should have been mounted on the little arm in the bottom at the 5pm area,,and try disconnecting everything from the carb,take off the aircleaner and with a flashlight open the throttle by hand and look down openings to look for any binding,,does the carb return to closed by its self?
Team Owner
Joined: Sep 2006
Posts: 31,235
Likes: 4,325
From: Westminster Maryland
Hi t,
In addition to the placement of the spring that dmxx mentions it also appears the 'tube' is missing from the front connector of the accelerator cable.
Might this be causing the cable to 'bind-up' under certain conditions and certain points in it's travel?
Regards,
Alan
Q-jet cable…. is the same as the LT-! cable.
The spring is the same too.
In addition to the placement of the spring that dmxx mentions it also appears the 'tube' is missing from the front connector of the accelerator cable.
Might this be causing the cable to 'bind-up' under certain conditions and certain points in it's travel?
Regards,
Alan
Q-jet cable…. is the same as the LT-! cable.
The spring is the same too.
Thread Starter
Racer
Joined: Aug 2000
Posts: 426
Likes: 0
Thanks for the replies.
I was thinking a spring should go where dmaxx mentioned. I'd like to see how other LT-1 owners have their setup. The carb will return closed most of the time, but it'll get stuck sometimes if the gas pedal goes all the way to the floor. I can't seem to easily reproduce the issue though.
At one point I did have a tube over the cable, but it got jammed up on the other end and the throttle wouldn't release. I cut it off to avoid that problem again.
I was thinking a spring should go where dmaxx mentioned. I'd like to see how other LT-1 owners have their setup. The carb will return closed most of the time, but it'll get stuck sometimes if the gas pedal goes all the way to the floor. I can't seem to easily reproduce the issue though.
At one point I did have a tube over the cable, but it got jammed up on the other end and the throttle wouldn't release. I cut it off to avoid that problem again.
Burning Brakes
Joined: Jan 2006
Posts: 1,072
Likes: 331
From: Clear Lake Shores Texas
2016 C3 of Year Finalist
Here's the setup on my 72 LT-1. It looks the same as yours, I think, and I have never had any issues with the throttle sticking.
Last edited by dan1495; Aug 7, 2017 at 09:50 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Pro
Joined: Jan 2001
Posts: 511
Likes: 66
From: Timnath, CO
I'm not an expert on this, but I think you should also check the parts besides the linkage. I've had my carburetor get stuck with the engine running a steady 1,500 to 2,000 RPM. I've had to lubricate the area with the rod attached to the throttle plates every 1-2 years. Perhaps something besides the linkage is getting stuck.