Posted by Janicholson on December 27, 2008 at 10:25:22 from (68.112.156.69):
In Reply to: 656 pops when idling posted by Scott in Illinois on December 27, 2008 at 08:14:48:
Gas farmalls will miss once in a while at Idle (most gasoline engines will do it) when they do, they push unburnt fuel and air into the exhaust manifold. This ignites and makes a deep misfire/backfire type noise. If it has a flip rain cap on the exhaust, it will make it pop open and slam shut. If our tractors failed to do this, I would begin to look at the raincap to see if it was rusted up. Seriously if it runs well off idle, and is not a consistant cylinder misfire, ignore it, or consider it charming. Many tractors do not do it, but all mine, and the neighbors do. Fuel injection, electronic ignition/engine control, and modern valve setups in Automobiles have made many old sounds obsolete. JimN
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Today's Featured Article - Farmall 460: That's My Girl - by LeAnn R. Ralph. How many sounds can you think of that are as familiar to you as your own breathing? What about the hum of your refrigerator? Or the thump of your clothes dryer? Maybe the engine of your car? You hear those sounds every day, and you don't think much about them, do you. I can think of a few common, ordinary sounds in my daily life, too.
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