Engine stops at stop sign

[Ray A from PA]

A problem has developed when I come to a stop at a stop sign or red light. My engine stops unless I step on accelerator or pull down on hand throttle. I have set idle to a faster RPM, adjusted carburetor, checked timing with no positive results. I am open to suggestions, Thanks Ray.

[tiquer]

Check the float level

[Dave in Boise]

If you have another carb, give that a try first and see if it changes the behavior at all. You mention that it will stay running if you goose the throttle, so the problem does not appear electrical in nature. So the remaining items are air and fuel.

I would not expect that airflow stops at the stop sign. that leaves fuel.

Float issues are notoriously stubborn to sort out, so see if you can try a known good carb.

Have you adjusted the float level? You might have an issue with the float. I have seen floats that have developed pinhole leaks sinking them and causing the level to be too high and flooding the carb on stop with too muich fukel for the airflow.

[glenn in camino]

Sounds to me like the carburetor throttle shaft is worn and is leaking air. The fix is to install bushings in the carb to eliminate the leak. Brattons sells the bushings and instructions.

[Tudortomnz]

Why not take out the jets & give them a good 'blow'. That will probably solve the problem.

[Tom Wesenberg]

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Is the problem worse on hot days, or is it just that the engine likes to die upon rapid deceleration?

[Ray A from PA]

Weather appears to have no effect,engine just dies on deceleration.The only time it does this is on stops.Otherwise, it runs just great,starts great,idles great,good power,etc.

[HoarseWhisperer]

http://www.modela.org/symptoms.html

[Aerocraft]

Richen the idle mixture. Gar Williams

[Richard in Anaheim CA]

When driving around town, stop & go driving, open the mixture valve a quarter turn or so. Return to previous setting when on the road.

Richard
Anaheim CA

[ora masters]

Originally Posted by Richard in Anaheim CA

When driving around town, stop & go driving, open the mixture valve a quarter turn or so. Return to previous setting when on the road.

Richard
Anaheim CA

check your points gap

[Cory Moffat]

I had the same problem. The low speed passage in my carb was plugged.

[Ray A from PA]

I checked all areas of previous posts that were suggested and I still have the same problem, engine dies when stopping. The only solution that I have found is prior to stopping move hand throttle down a couple of notches.

[HoarseWhisperer]

You have replaced the throttle shaft as Glenn in Camino suggested?

Futzing with the throttle lever or GAV when coming to a stop is annoying and can be prevented. Good luck.

[jimvette59]

With every thing else being ok I have solved that problem by adjusting the float level with a kit / clear line out side of the carb. mounted to a drill press plate with the carb. level. Set the level at 5/8".

[broommaker]

My 28 was stopping when coming to a stop, Checked my points, to close, set them at .020, doing fine, no more shutting down....

Jim

[Jerry in Shasta]

Also check the manifold is tight and has no vacumn leaks.

[Roland/Pittsburgh]

Ray

I had the same problem and found that my compensator jet was too small. I replaced it with the proper size and the problem was solved. If the jet is too small the secondary well is drawn down by the idle jet when de-accelerating and can't refill quickly enough to prevent stalling from a lean mixture. This problem is worse when decending a hill with a stop sign at the bottom because going down hill effectivily lowers the fuel level in the secondary well.

[Mort]

I had the same problem and went through most of the above suggestions - zip, still did it. Then I changed plugs. I got a repo set of 3X for a good price and so installed them, nothing to do with the stalling problem, just changed to the 3X.
No more stalling at a stop???

[BILL WILLIAMSON]

Originally Posted by Richard in Anaheim CA

When driving around town, stop & go driving, open the mixture valve a quarter turn or so. Return to previous setting when on the road.

Richard
Anaheim CA

Open= leaner. Mixture screw is "ass backwards" from some carboonators.