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.
Spark sound? Do you mean backfire?
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.
Lean your carb just a little and see if it goes away.
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"
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.
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
Ok that would do it too! Glad you found the problem.
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.
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.......
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!.......
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.
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.