skydiveD30571
Lieutenant Junior Grade
- Joined
- Feb 13, 2012
- Messages
- 1,042
VP 5.0 GL-H with 2 barrel Holley.
I notice that sometimes when returning to neutral detent on the control, the idle speed sometimes rests about 100-150rpm higher. This seems to happen more often during cooler days, but still happens randomly on any day. I can manually push the throttle bracket on the carb and it drops down to normal. I removed the cable from the bracket and saw no change, meaning the carb doesn't close that last little bit on its own. When closed correctly, idle speed is 700rpm and 650 in gear. Obviously this little extra rpm make shifting a burdon and I know its hard on the drive.
I also noticed the cable has a bit of free play. As a test with the cable disconnected from the throttle bracket, I pushed the control to the WOT position, then returned to neutral. The throttle cable connector was about a 1/4" off of the bracket, but by slightly pulling the cable the free play was taken out and they aligned correctly.
Earlier this year I adjusted the cable to provide a little force to close the carb when at idle. It seems like since then, the cable may have developed some more play?
Without the free play, the cable pushes the carb closed and all is good. With this play, there is no pushing force and the carb doesn't close all the way on its own.
My question is, how much play is normal on a throttle cable? Is it normal for a carb not to close that last little bit without a small amount of push? I'm sure I could adjust the cable again to force it closed, but since it sometimes does and sometimes doesn't return to the normal position, I'm afraid of adjusting that and causing other problems. As always, thanks.
I notice that sometimes when returning to neutral detent on the control, the idle speed sometimes rests about 100-150rpm higher. This seems to happen more often during cooler days, but still happens randomly on any day. I can manually push the throttle bracket on the carb and it drops down to normal. I removed the cable from the bracket and saw no change, meaning the carb doesn't close that last little bit on its own. When closed correctly, idle speed is 700rpm and 650 in gear. Obviously this little extra rpm make shifting a burdon and I know its hard on the drive.
I also noticed the cable has a bit of free play. As a test with the cable disconnected from the throttle bracket, I pushed the control to the WOT position, then returned to neutral. The throttle cable connector was about a 1/4" off of the bracket, but by slightly pulling the cable the free play was taken out and they aligned correctly.
Earlier this year I adjusted the cable to provide a little force to close the carb when at idle. It seems like since then, the cable may have developed some more play?
Without the free play, the cable pushes the carb closed and all is good. With this play, there is no pushing force and the carb doesn't close all the way on its own.
My question is, how much play is normal on a throttle cable? Is it normal for a carb not to close that last little bit without a small amount of push? I'm sure I could adjust the cable again to force it closed, but since it sometimes does and sometimes doesn't return to the normal position, I'm afraid of adjusting that and causing other problems. As always, thanks.
