The Ford Barn

Ford coupe · 12-03-2016, 07:33 PM

Friends 55 all original lightly backfires when pushing again compression like when going down a hill..It is a 272 with standard tranny.so hope someone can maybe help..It is hard to explain but it seems to goThanks poof poof or maybe patch patch and is not really a loud backfire per say..

Ford coupe · 12-03-2016, 07:35 PM

Next time I will review my post ..Sorry Harry

Lanny · 12-03-2016, 07:58 PM

I would check the timing. It could also be that the muffler is wore out.

.

Johnnydidd · 12-03-2016, 08:40 PM

Sit back and enjoy the sound

Ford Freak · 12-03-2016, 09:29 PM

My '57 Fairlane w/a 312 would do that when going down a big hill (when I took my foot off the gas ). I don't think its anything to worry about . - FF

Ole Don · 12-04-2016, 09:37 AM

Sponsored Links (Register now to hide all advertisements)

Light backfire through the exhaust at closed throttle downhill is normal.

willowbilly3 · 12-08-2016, 11:33 PM

Check the points. Mine makes a little more of a pop when the rubbing block is going away and they are not opening enough.

Alaska Jim · 12-08-2016, 11:51 PM

when I first got my 51 merc, the tailpipes from the mufflers back were swiss cheese, and did the same thing, when I replaced the exhaust , no more problem. I think holes in the exhaust pipes caused the light backfiring.

dmsfrr · 12-09-2016, 10:50 PM

It's been way too many years since I've had the pleasure of driving and listening to a nice V8 pop out of the tailpipes.
When the carb throttle plates are closed at higher rpm the intake manifold vacuum goes high, pulling some (extra?) fuel thru the idle jets but with virtually no air in the resulting fuel/air mixture. Without enough air the mixture only partially ignites in the cylinder, then it passes out into the hot exhaust pipes where it usually finds a bit of extra oxygen and can re-ignite.
As long as the engine is burning cleanly the rest of the time, enjoy the music.

.

50fordcoupeman · 12-10-2016, 12:39 AM

Hi all,
I have a stock bodied 50 Ford coupe with a 302 so I don't really belong on any of the Fordbarn sites but the sound every one is describing is what I have also. That is the perfect sound as far as I am concerned. Love it!!

40 Deluxe · 12-10-2016, 12:16 PM

Anyone who finds this sound annoying is not a true gearhead!

dmsfrr · 12-10-2016, 01:23 PM

Quote:

Originally Posted by 50fordcoupeman

... belong ...

Early & Late V8, both work for you in my book. It all counts.

50fordcoupeman · 12-10-2016, 04:05 PM

Thanks dmsfrr..........I appreciate that!!

WestCoast · 12-11-2016, 10:06 PM

man its still ford, you just made it go faster, so come on in and enjoy

WestCoast · 12-11-2016, 10:13 PM

I had a 57 Studebaker silver hawk that did that, it was the fuel pump over powering the needle and seat on down hill engine on compression, flooded the carb and let the engine back fire, added a fuel pressure regulater and solved the problem

50fordcoupeman · 12-11-2016, 11:29 PM

Thanks WestCoast!! I will and I do...........

12-03-2016, 07:33 PM	#1
Ford coupe Senior Member Join Date: May 2010 Location: Napanee ontario Canada Posts: 395	%% back firing Friends 55 all original lightly backfires when pushing again compression like when going down a hill..It is a 272 with standard tranny.so hope someone can maybe help..It is hard to explain but it seems to goThanks poof poof or maybe patch patch and is not really a loud backfire per say..

12-03-2016, 07:35 PM	#2
Ford coupe Senior Member Join Date: May 2010 Location: Napanee ontario Canada Posts: 395	Re:55 back firing Next time I will review my post ..Sorry Harry

12-03-2016, 07:58 PM	#3
Lanny Senior Member Join Date: May 2010 Location: Mn Posts: 2,411	Re: %% back firing I would check the timing. It could also be that the muffler is wore out. . __________________ If mama ain't happy, ain't nobody happy. But if daddy ain't happy...RUN

12-03-2016, 08:40 PM	#4
Johnnydidd Senior Member Join Date: Mar 2011 Location: Overland Park, Ks Posts: 559	Re: %% back firing Sit back and enjoy the sound

12-03-2016, 09:29 PM	#5
Ford Freak Senior Member Join Date: Feb 2013 Location: Pittsford NY. USA Posts: 1,096	Re: %% back firing My '57 Fairlane w/a 312 would do that when going down a big hill (when I took my foot off the gas ). I don't think its anything to worry about . - FF

12-04-2016, 09:37 AM	#6
Ole Don Senior Member Join Date: May 2010 Location: St. Michael, Minnesota Posts: 1,713	Re: %% back firing Sponsored Links (Register now to hide all advertisements) Light backfire through the exhaust at closed throttle downhill is normal.

12-08-2016, 11:33 PM	#7
willowbilly3 Senior Member Join Date: Sep 2011 Location: Black Hills, SD Posts: 577	Re: %% back firing Check the points. Mine makes a little more of a pop when the rubbing block is going away and they are not opening enough.

12-08-2016, 11:51 PM	#8
Alaska Jim Senior Member Join Date: May 2010 Location: Palmer, Alaska Posts: 1,575	Re: %% back firing when I first got my 51 merc, the tailpipes from the mufflers back were swiss cheese, and did the same thing, when I replaced the exhaust , no more problem. I think holes in the exhaust pipes caused the light backfiring.

12-09-2016, 10:50 PM	#9
dmsfrr Senior Member Join Date: Aug 2012 Location: Abq, NM Posts: 3,607	Re: %% back firing It's been way too many years since I've had the pleasure of driving and listening to a nice V8 pop out of the tailpipes. When the carb throttle plates are closed at higher rpm the intake manifold vacuum goes high, pulling some (extra?) fuel thru the idle jets but with virtually no air in the resulting fuel/air mixture. Without enough air the mixture only partially ignites in the cylinder, then it passes out into the hot exhaust pipes where it usually finds a bit of extra oxygen and can re-ignite. As long as the engine is burning cleanly the rest of the time, enjoy the music. . Last edited by dmsfrr; 12-10-2016 at 01:18 PM.

12-10-2016, 12:39 AM	#10
50fordcoupeman Senior Member Join Date: Mar 2016 Location: LaGrande Oregon Posts: 866	Re: %% back firing Hi all, I have a stock bodied 50 Ford coupe with a 302 so I don't really belong on any of the Fordbarn sites but the sound every one is describing is what I have also. That is the perfect sound as far as I am concerned. Love it!!

12-10-2016, 12:16 PM	#11
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: %% back firing Anyone who finds this sound annoying is not a true gearhead!

12-10-2016, 04:05 PM	#13
50fordcoupeman Senior Member Join Date: Mar 2016 Location: LaGrande Oregon Posts: 866	Re: %% back firing Thanks dmsfrr..........I appreciate that!!

12-11-2016, 10:06 PM	#14
WestCoast Senior Member Join Date: Sep 2014 Location: oroville calif Posts: 893	Re: %% back firing man its still ford, you just made it go faster, so come on in and enjoy

12-11-2016, 10:13 PM	#15
WestCoast Senior Member Join Date: Sep 2014 Location: oroville calif Posts: 893	Re: %% back firing I had a 57 Studebaker silver hawk that did that, it was the fuel pump over powering the needle and seat on down hill engine on compression, flooded the carb and let the engine back fire, added a fuel pressure regulater and solved the problem

12-11-2016, 11:29 PM	#16
50fordcoupeman Senior Member Join Date: Mar 2016 Location: LaGrande Oregon Posts: 866	Re: %% back firing Thanks WestCoast!! I will and I do...........