HELP! Throttle hanging up UPDATE
#3077538
09/15/22 02:43 PM
09/15/22 02:43 PM
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Joined: Nov 2006
Posts: 733 Nampa, ID
MadMatt
OP
super stock
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OP
super stock
Joined: Nov 2006
Posts: 733
Nampa, ID
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I have a problem that’s really stumping me. A few weeks ago my throttle started hanging up and not fully returning to idle. I have checked everything and it seems to be working smoothly. When it hangs up I can lift up on the the gas pedal with my toe and it returns to idle. The throttle cable is an OEM type purchased from Ehrenberg and is only a couple of years old. I’ve disconnected it from the pedal and carb and it moves freely. The carb linkage seems to operate freely. I’ve replaced the throttle return spring with a hefty double spring that has increased the pedal effort noticeably, but it still hands up. The throttle cable pivots freely on the carb arm so it’s not hanging up there. I even lubed the gas pedal pivot. The only thing I can think of is that perhaps the throttle cable. Oh, and it’s a BG Road Demon carb. Any suggestions would REALLY be appreciated.
Okay, it’s definitely an issue with the throttle cable. I had my girlfriend depress and release the pedal to varying degrees of throttle opening and each time it failed to fully return. And the more she pressed it the further open it stuck. With the cable disconnected the carb snaps right back to fully closed. 🤨
Last edited by MadMatt; 09/15/22 03:20 PM. Reason: Update
Some see the glass as half empty, some see the glass as half full. I just drink straight out of the bottle.
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Re: HELP! Throttle hanging up
[Re: MadMatt]
#3077543
09/15/22 02:49 PM
09/15/22 02:49 PM
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Joined: Jan 2005
Posts: 4,450 Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,450
Michigan
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I have a problem that’s really stumping me. A few weeks ago my throttle started hanging up and not fully returning to idle. I have checked everything and it seems to be working smoothly. When it hangs up I can lift up on the the gas pedal with my toe and it returns to idle. The throttle cable is an OEM type purchased from Ehrenberg and is only a couple of years old. I’ve disconnected it from the pedal and carb and it moves freely. The carb linkage seems to operate freely. I’ve replaced the throttle return spring with a hefty double spring that has increased the pedal effort noticeably, but it still hands up. The throttle cable pivots freely on the carb arm so it’s not hanging up there. I even lubed the gas pedal pivot. The only thing I can think of is that perhaps the throttle cable. Oh, and it’s a BG Road Demon carb. Any suggestions would REALLY be appreciated. Are you using studs or bolts on the carb? Use studs if not already and retorque evenly on all four corners crisscrossing as if you were bolting a wheel on. Had the throttle blades stick open just past idle on a Holley once and this solved it. My guess is the unequal torque was warping the carb body slightly.
1987 Fifth Avenue - 512/518/D60
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Re: HELP! Throttle hanging up
[Re: topside]
#3077658
09/15/22 09:07 PM
09/15/22 09:07 PM
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Joined: Nov 2006
Posts: 733 Nampa, ID
MadMatt
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super stock
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OP
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Where does the cable attach to the arm ? Some locations can cause a bind or over-center, where the arm's motion has interference. Or maybe some other linkage is interfering ? Throttle blade or air cleaner interference, perhaps ? It attaches in the same spot it always has and I haven't had a problem before. I checked for interference with other things and don't see any. Also it happens with the air cleaner off and nothing anywhere near the cable. The cable attaching point has a little slack and pivots freely, so I don't think it's binding anywhere. I did notice that the problem started right after you were here helping me work on the car so I figure you sabotaged it. I'll get even...
Some see the glass as half empty, some see the glass as half full. I just drink straight out of the bottle.
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Re: HELP! Throttle hanging up
[Re: 71GTX471]
#3077659
09/15/22 09:08 PM
09/15/22 09:08 PM
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Joined: Nov 2006
Posts: 733 Nampa, ID
MadMatt
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super stock
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OP
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Joined: Nov 2006
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Remove the cable & hang it up, then dribble chain/cable lube into it till it drips out the bottom. Thanks, I'll give that a try.
Some see the glass as half empty, some see the glass as half full. I just drink straight out of the bottle.
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Re: HELP! Throttle hanging up UPDATE
[Re: MadMatt]
#3077662
09/15/22 09:13 PM
09/15/22 09:13 PM
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Joined: Nov 2006
Posts: 733 Nampa, ID
MadMatt
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super stock
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OP
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Does anyone think the way the throttle cable "loops" around could cause it to bind? Isn't that kind of the point of a cable is that it can be routed like this?
Some see the glass as half empty, some see the glass as half full. I just drink straight out of the bottle.
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Re: HELP! Throttle hanging up UPDATE
[Re: TJP]
#3077664
09/15/22 09:17 PM
09/15/22 09:17 PM
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Joined: Nov 2006
Posts: 733 Nampa, ID
MadMatt
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super stock
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1. A cable that's adjusted too tight at idle will create the above symptoms 2. A gasket overhanging the opening in the intake will also do the same. 3. Might want to check you mechanical advance and make sure it is returning to its initial setting before it reaches IDLE RPM. If the springs are a bit loose it will cause the idle to "float" and make one chase their tail. AMHIK Suggestion #1 is something I'll double check. I did adjust the throttle cable to make sure I was getting full throttle opening and it's possible I need a bit more slack. But I think the fact that I can get it back to idle by lifting the pedal with my toe kind of rules out both #2 and #3. Also the further you press the pedal the farther open it hangs up so I still think it's an issue with the cable dragging somehow.
Some see the glass as half empty, some see the glass as half full. I just drink straight out of the bottle.
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Re: HELP! Throttle hanging up
[Re: MarkZ]
#3077670
09/15/22 09:22 PM
09/15/22 09:22 PM
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Joined: Nov 2006
Posts: 733 Nampa, ID
MadMatt
OP
super stock
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OP
super stock
Joined: Nov 2006
Posts: 733
Nampa, ID
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I have a problem that’s really stumping me. A few weeks ago my throttle started hanging up and not fully returning to idle. I have checked everything and it seems to be working smoothly. When it hangs up I can lift up on the the gas pedal with my toe and it returns to idle. The throttle cable is an OEM type purchased from Ehrenberg and is only a couple of years old. I’ve disconnected it from the pedal and carb and it moves freely. The carb linkage seems to operate freely. I’ve replaced the throttle return spring with a hefty double spring that has increased the pedal effort noticeably, but it still hands up. The throttle cable pivots freely on the carb arm so it’s not hanging up there. I even lubed the gas pedal pivot. The only thing I can think of is that perhaps the throttle cable. Oh, and it’s a BG Road Demon carb. Any suggestions would REALLY be appreciated. Are you using studs or bolts on the carb? Use studs if not already and retorque evenly on all four corners crisscrossing as if you were bolting a wheel on. Had the throttle blades stick open just past idle on a Holley once and this solved it. My guess is the unequal torque was warping the carb body slightly. I'll check that everything is evenly torqued. Thanks!
Last edited by MadMatt; 09/15/22 09:23 PM.
Some see the glass as half empty, some see the glass as half full. I just drink straight out of the bottle.
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Re: HELP! Throttle hanging up UPDATE
[Re: calrobb2000]
#3077714
09/16/22 04:49 AM
09/16/22 04:49 AM
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Joined: Oct 2005
Posts: 1,646 Ringtown, Pa.
Dartsport540
top fuel
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top fuel
Joined: Oct 2005
Posts: 1,646
Ringtown, Pa.
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I have had the nut that tightens on the throttle cable clamp, at the carburetor be just a little too tight, and it would make the throttle stick a little. Loosen the throttle cable clamp nut an 1/8 of a turn.
548 cu. in., Bill Mitchell Aluminum Block, CRT 727 auto trans, Alston Chassis. 8.981et at 149.46 mph. 1.204et - 60 foot, So Far....
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Re: HELP! Throttle hanging up UPDATE
[Re: MadMatt]
#3077968
09/16/22 10:30 PM
09/16/22 10:30 PM
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Joined: Jan 2003
Posts: 15,498 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,498
Omaha Ne
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1. A cable that's adjusted too tight at idle will create the above symptoms 2. A gasket overhanging the opening in the intake will also do the same. 3. Might want to check you mechanical advance and make sure it is returning to its initial setting before it reaches IDLE RPM. If the springs are a bit loose it will cause the idle to "float" and make one chase their tail. AMHIK Suggestion #1 is something I'll double check. I did adjust the throttle cable to make sure I was getting full throttle opening and it's possible I need a bit more slack. But I think the fact that I can get it back to idle by lifting the pedal with my toe kind of rules out both #2 and #3. Also the further you press the pedal the farther open it hangs up so I still think it's an issue with the cable dragging somehow. not necessarily on 2 and 3. Looking at your picture, at Idle and off choke, You should be able to move the cable up and down slightly WITHOUT the throttle arm moving AT ALL The end connections ( both) in the oval shuld be free to move with NO DRAG IE: screw too tight, cable end binding on throttle arm due to being too short The comment on the clamp being too tight is another possible culprit keep us posted
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Re: HELP! Throttle hanging up UPDATE
[Re: B1MAXX]
#3078062
09/17/22 11:40 AM
09/17/22 11:40 AM
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Joined: May 2019
Posts: 6,318 nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,318
nowhere
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