Posted by notjustair on November 25, 2016 at 17:49:38 from (184.191.48.136):
So after much tinkering I finally get my (grandpas) 1935 Chevy truck started today. She runs very well for not running for 30 years and not having the best mechanical care the thirty years prior. I rebuilt the carb and fuel system but didn't check the timing or anything yet. That's where the fireworks come in.
I fired it up in the machine shed and pulled it out lest it burst into flames or something. I have this odd thing about that when I've just rebuilt an engine or started something after a long rest. All of my years working on air cooled VW's made me cautious. It was just about dusk and I noticed sparks coming from the exhaust. It's just a straight pipe as the muffler left sometime in the 70's and didn't seem necessary for feeding cattle. Of course I was a tad concerned because the fuel tank is right above that straight pipe (under the seat). So I let the old girl idle there for about 15 minutes and she continues this sparking business. Not like a sparkler but about like mig welding. My first thought is a nest in there, but it isn't bits of flaming material - it's like slag. I immediately think carbon buildup. Did I mention my uncle never changed the oil in the 30 years he drove it everyday?
The thing is, it never stopped. I drove it about a quarter mile down the road and when I got back I got a "talking to" from the wife about how I WAS NOT driving that truck again until I sorted that out because there were "millions" of sparks up and down the road.
Could carbon buildup take that long to burn off? She was still sparking when I shut it down after 30 minutes. The thermostat had opened many times and it was at full temp for quite a while.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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