Throwing spark out the exhaust

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Model T Ford Forum: Forum 2013: Throwing spark out the exhaust
Top of pagePrevious messageNext messageBottom of page Link to this message  By Enos Wiseman on Tuesday, August 06, 2013 - 09:02 pm:

Just went for a spin in my 26 touring this evening and before returning home I started hearing this spark sound like she's throwing spark out the exhaust on gear down. doesn't do it with a load gearing up. Any ideas what I should look for.
Thanks


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Kopsky, Lytle TX on Tuesday, August 06, 2013 - 09:20 pm:

Spark sound? Do you mean backfire?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Enos Wiseman on Tuesday, August 06, 2013 - 09:26 pm:

Not really a back fire just a low noise almost like a jake break but lower than a backfire. I guess you could describe it as a soft backfire. hard to describe.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jack Daron - Brownsburg IN on Tuesday, August 06, 2013 - 09:33 pm:

Lean your carb just a little and see if it goes away.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Enos Wiseman on Tuesday, August 06, 2013 - 09:42 pm:

Thanks I'll try that first thing tomorrow. Sounds more like spark though, so my mechanic friend said. "he is a modern car mechanic not a T"


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Dallas TX on Tuesday, August 06, 2013 - 09:47 pm:

You have an air leak in your exhaust. It normally happens with a closed throttle as you describe. Likely you have an overly rich mixture and a loose fitting pipe into the muffler.

You can prevent this by adjusting the mixture to the point that the engine slows down at cruise, then opening until it runs best.

It also helps to smear some RTV around the pipe prior to inserting it into the muffler.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Enos Wiseman on Wednesday, August 07, 2013 - 03:17 pm:

Thanks Royce:
It was the muffler it was loose and sliding around. The joint in the muffler has come apart so I think a new muffler will be the fix. Thanks


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Dallas TX on Wednesday, August 07, 2013 - 09:53 pm:

Ok that would do it too! Glad you found the problem.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ted Dumas on Wednesday, August 07, 2013 - 10:38 pm:

Weld your old one together or get one from a muffler shop. After some time the repro mufflers will fall apart as you drive down the road unless you weld them together before you install them.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Craig Anderson, central Wisconsin on Wednesday, August 07, 2013 - 11:19 pm:

Speaking of backfire.........and the exhaust system.......I pulled a dandy today....... (headbang)
"Just because" I took the Anderson timer cover off on the '27 Tudor for inspection and while I was at it took a peek at the coils.
I put everything back together and went off to do something else.
It got to be coffee time so I started the Tudor and HOLY CRAP....BANG, stutter, fart, BANG, quit, start, BANG...... YIKES.......NOW what.......
As it didn't make any difference between battery or mag I figured fuel.....checked all that out and THEN I SAW IT........I put the damn coil box cover on BACKWARD.......
Yeah.......so....... LOL
THEN this evening I went out again and the exhaust was getting louder and louder.
The tailpipe nut had darn near unscrewed itself off.
It's always something.......

At least now I know everything else is ship shape!....... :-)


Top of pagePrevious messageNext messageBottom of page Link to this message  By Doug Money - Braidwood, IL on Thursday, August 08, 2013 - 10:32 am:

Craig, I had that a week ago. On the way home from a trip the exhaust was getting louder but the car ran fine. I even noticed it was running a slight bit better. The nut was almost off. I check it periodically and it is never loose that is why it surprised me.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Willie K Cordes on Thursday, August 08, 2013 - 10:51 am:

Welcome to the T world Doug. The venders sell clamps to go round the exhaust pipe and clamp the nut at the same time. This seems to work fine or you can rig your own clamp/wire or whatever.


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