The Ford Barn

tonydennisadw · 08-14-2018, 05:36 PM

flathead ford 52 popping through muffler when letting off gas some loud esp in 2nd gear any thoughts would that be a 2 rich carb????? Dennis also been baking the car in sun for 4 days now and paint still sticky in sun and seems dry when cooled off o well.....been over 2 months not for that o well guess a diff paint job......

drolston · 08-14-2018, 06:07 PM

Popping back when letting off is generally from unburned gas in the exhaust, which can be caused by too rich. There are other possible causes, including too lean! What do your plugs say? Rich/blackish or lean/whitish?

flatjack9 · 08-14-2018, 09:33 PM

Also caused by retarded timing.

BUBBAS IGNITION · 08-15-2018, 03:08 PM

Exhaust has a air leak .......

rotorwrench · 08-16-2018, 01:32 PM

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Yep, leaky exhaust valves is the most common problem.

08-14-2018, 05:36 PM	#1
tonydennisadw Senior Member Join Date: May 2015 Location: sw ohio Posts: 130	1952 ford poppin when ltting off gas flathead ford 52 popping through muffler when letting off gas some loud esp in 2nd gear any thoughts would that be a 2 rich carb????? Dennis also been baking the car in sun for 4 days now and paint still sticky in sun and seems dry when cooled off o well.....been over 2 months not for that o well guess a diff paint job......

08-14-2018, 06:07 PM	#2
drolston Senior Member Join Date: Jun 2014 Location: Williamsburg, VA Posts: 1,627	Re: 1952 ford poppin when ltting off gas Popping back when letting off is generally from unburned gas in the exhaust, which can be caused by too rich. There are other possible causes, including too lean! What do your plugs say? Rich/blackish or lean/whitish?

08-14-2018, 09:33 PM	#3
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,526	Re: 1952 ford poppin when ltting off gas Also caused by retarded timing.

08-15-2018, 03:08 PM	#4
BUBBAS IGNITION Senior Member Join Date: May 2010 Location: SPEEDWAY INDIANA Posts: 4,148	Re: 1952 ford poppin when ltting off gas Exhaust has a air leak ....... __________________ If it Makes Spark, we do it !!!! www.bubbasignition.com [email protected]

08-16-2018, 01:32 PM	#5
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,426	Re: 1952 ford poppin when ltting off gas Sponsored Links (Register now to hide all advertisements) Yep, leaky exhaust valves is the most common problem.