The Ford Barn

German guy · 06-02-2026, 01:35 AM

Try a few easy fixes first.

I have never been a believer in anything that I could pour into a car having any real effectiveness...BUT...I had stalling on stops a few months ago and tried pouring a fuel system and valve cleaner into the half full gas tank. The problem stopped after driving about 25 miles and has not come back.

Steve_Mack_CT · 06-02-2026, 07:56 AM

I also posted about this issue a couple months back and realized I said I would give an update. It's fixed. Two - maybe 3 factors in play to fix the issue.
1. Engine has a hi comp head, B cam & 0.100 overbore. May want a slightly richer mix in general, but not a huge difference.
2. Float needed adjusting. Changed out float valve as well just in case.
3. Self inflicted - I miss-adjusted idle earlier making problem worse. Despite this being our third Model A in the past 25 years or so, idle adjustment on our other prewar cars - heck most anything idle adjustment I have done before are opposite. Sharing in case others do the same thing.

Car idles well and level or bottom of a hill stops ⁶don't present any issues. Now on to the next thing!

32Ford13 · Yesterday, 05:53 AM

I knew I didn’t have a vacuum leak. My stalling was cured by turning the air screw in on the carb. I did a little at a time and found a sweet spot. Had to tweek on the idle speed at the same time. Problem solved.

06-02-2026, 01:35 AM	#21
German guy Senior Member Join Date: Sep 2023 Location: German/French border Posts: 163	Re: Stalling at stop sign Try a few easy fixes first. I have never been a believer in anything that I could pour into a car having any real effectiveness...BUT...I had stalling on stops a few months ago and tried pouring a fuel system and valve cleaner into the half full gas tank. The problem stopped after driving about 25 miles and has not come back.

06-02-2026, 07:56 AM	#22
Steve_Mack_CT Senior Member Join Date: Jun 2015 Location: Central CT Posts: 379	Re: Stalling at stop sign I also posted about this issue a couple months back and realized I said I would give an update. It's fixed. Two - maybe 3 factors in play to fix the issue. 1. Engine has a hi comp head, B cam & 0.100 overbore. May want a slightly richer mix in general, but not a huge difference. 2. Float needed adjusting. Changed out float valve as well just in case. 3. Self inflicted - I miss-adjusted idle earlier making problem worse. Despite this being our third Model A in the past 25 years or so, idle adjustment on our other prewar cars - heck most anything idle adjustment I have done before are opposite. Sharing in case others do the same thing. Car idles well and level or bottom of a hill stops ⁶don't present any issues. Now on to the next thing! __________________ Steve Current: 1931 Model A Deluxe Roadster

Yesterday, 05:53 AM	#23
32Ford13 Senior Member Join Date: Oct 2023 Location: Redneck Ranch on Hot Rod Hill Posts: 114	Re: Stalling at stop sign I knew I didn’t have a vacuum leak. My stalling was cured by turning the air screw in on the carb. I did a little at a time and found a sweet spot. Had to tweek on the idle speed at the same time. Problem solved.