varoom varoom poop poop poop

[Christopher]

Hey christopher from the high and lonesome here, I know I don't say much, but I have been watchin you all... got mr. Mike out[snows gone ] tryin to track down a rumble like miny back fires on deceleration...any common cause come to mind,, he takes off fine no detectable miss..just slowin down, roooooooom poop poop poop....Christopher

[Normspeed]

Sounds sorta like me late on a Saturday night. Check for overly rich mixture like choke partially closed, or retarded timing. Retarded timing can cause exhaust backfires. I had to pay extra to make mine pop like that

[randroid]

Christopher,

If the poop-poop-poop part occurs like little backfires, they come from incomplete burning of the air-fuel mixture. As it accumulates in the exhaust system there will be something there to ignite it.

Most of the time this is caused by a rich carburator, but also common is your timing is off. This is going on the assumption that points, plugs, etc. are in good shape. I have found generally that while the sky might be the limit for what may cause your problem, it is usually an adjustment and not a major problem. Do fix it as soon as you can, though, so it doesn't become a bigger problem.

-Randy

[Don Coatney]

Christopher;

Good to hear from you. Sounds as if you have a slight exhaust leak allowing fresh air to enter the exhaust system and ignite bits of unburned fuel.

[BobT-47P15]

Hi Christopher. I bought an electric chain saw. Will it work as well for auto body work as a gas model???

Hope all is going well for you and your family.

Bob

[Merle Coggins]

I was always tought that backfiring during deceleration, with closed throttle, is due to over lean mixture. Could be a partially blocked idle circuit not allowing enough gas through during those conditions.

Just my opinion,

Merle

[claybill]

me too merle....too lean mixture will cause a pop on de-celleration. like coasting down a hill, throttle closed. onece it happened to me after i changed air cleaners on my 55 ford.

bill ./claybill/

[Plymouthy Adams]

Coatney listed my answer..fresh air in the exhaust..check for exhasut leaks that will allow sucking in of air.

[greg g]

I'd lean toward timing issues. Do you know where you're running. Today's gas, especially winter blend, likes timing a bit more advanced than stock. This gas goes Whooomph, rather than BANG like in the old days.

[Christopher]

put the old vacume gAGE on, adjusted timeing and carb to that, running much better not doing the poop poop poop. just a slight miss now..[very slight] time for new points and stuff...thaanks guys Christopher.... ..

[1just4don]

...."POOPS" needs a diaper. Okay I promise to set out the next three threads.

From my three legged stool in the corner--d--

[grey beard]

Good Good Giy Don hit this one smack on the head. We used to get complaints from truckers - back when they still used gas engines - about complaints of backing off on deceleration - going down hill. This shows up on trucks more often than cars due to the weight involved on downhill grages. The problem was always resolved after exhaust leaks were fixed.

Believe it or not, you can find 'em with a rag. Get a buddy (or a child) to hold the rag tightly over the end of your exhaust whilst you crawl under and listen. Problem can be anywhere from the exhaust flange on the manifold to the tail pipe, but most often is found in front of the muffler. What is strange is that even though this is popping off is caused by exhaust leaks, the pop shows up before the noise from the leak is ogjectionable. Go figure . . . . ..

JMHO:)

[norrism1]

I would check the exhaust manifold heat riser. It may not be working properly.

[Guest jtw3749c]

Mine throws fire out the back about 15 feet. Of course mine are caused by Model T coils....

[TodFitch]

The one time I had this issue it turned out to be a warped exhaust manifold causing a small exhaust leak. So I concur the Don C.