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Braking shuts off engine? / Idle speed needle does nothing?

Braking shuts off engine? / Idle speed needle does nothing?

Old 06-17-2011, 07:41 PM
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Default Braking shuts off engine? / Idle speed needle does nothing?

Whenever I start my truck, I'll drive it for a bit (it also seems sluggish), but whenever I brake, the car shuts off.

Which brings me to my second problem, when I try to fix it using the idle speed needle, the needle doesn't do anything.

HALP
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Old 06-17-2011, 07:46 PM
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This is usually caused from a bad clutch bell bearing or a clutch not disengaging.
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Old 06-17-2011, 07:47 PM
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clutch spring broke or clutch bearings are locked up. If these aren't in good shape, they will cause drag and pull the idle down.

Now when you fix this area, be prepared to re-tune your engine - idle, low and high speed needles...
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Old 06-17-2011, 08:06 PM
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So a bad clutch would make the idle needle's turning not work?
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Old 06-17-2011, 08:11 PM
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Originally Posted by Latrodectus27 View Post
So a bad clutch would make the idle needle's turning not work?
What's happening is if the clutch doesn't disengage it will pull the engine down causing it to die. When it is idling does the wheels keep spinning at idle?
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Old 06-17-2011, 08:15 PM
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Originally Posted by travis4380 View Post
What's happening is if the clutch doesn't disengage it will pull the engine down causing it to die. When it is idling does the wheels keep spinning at idle?
No, it seems to idle fine. But when I go to accelerate, naturally I have to brake, and then the car shuts off.

The idle needle doesn't work, period. Turning it doesn't open/close the carb at all.
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Old 06-17-2011, 08:22 PM
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How for have you tried to screw it in? Pics of the Carb would be helpful.
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Old 06-17-2011, 08:26 PM
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Originally Posted by travis4380 View Post
How for have you tried to screw it in? Pics of the Carb would be helpful.
I've tried to turn it clockwise and counterclockwise, and it turns, but it has no effect on the carb opening.

Here's what's happening: When I throttle, the carb opens fine. When idling, the carb is somewhat fine. When I brake, the carb completely closes.
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Old 06-17-2011, 08:32 PM
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Try going a couple of turns clockwise maybe 4-5 just to see if it was backed out to far.
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Old 06-17-2011, 08:36 PM
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Originally Posted by travis4380 View Post
Try going a couple of turns clockwise maybe 4-5 just to see if it was backed out to far.
I've turned it in and out as far is it will go, with no effect on the carb opening.
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Old 06-17-2011, 08:59 PM
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You broke your idle stop screw... Back it all the way out and look at it... Does it look like this one here???

Only fix is to take the slide out of the carb to remove the broken part of the screw and then replace the whole idle stop screw...
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Old 06-17-2011, 09:01 PM
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FYI if the cause of a broken idle stop screw is when you twist the carb ball when you are installing/removing your throttle linkage... Probably happened the last time you pulled the engine.
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Old 06-17-2011, 09:27 PM
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these symptoms can also be caused by incorrect linkage setup... you could be closing your idle gap when applying the brakes.
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Old 06-17-2011, 11:03 PM
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Originally Posted by R/C Lidz View Post
these symptoms can also be caused by incorrect linkage setup... you could be closing your idle gap when applying the brakes.
Linkage, as in?

@ghost68, I'll pull the screw out tomorrow and see if it's broken.
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Old 06-17-2011, 11:24 PM
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Originally Posted by Latrodectus27 View Post
Linkage, as in?

@ghost68, I'll pull the screw out tomorrow and see if it's broken.
Throttle
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