Had problem on my 99 GMC K2500 same engine at 210 thousand getting slow to start and finial no start at times or die momentary going down the highway. Plenty of people telling me what it was or wasn't. Acted like a fuel problem at first because it would take a notion to start sometimes after a squirt of either. Checked all connections and grounds, fuel pressure, 58 # was good enough for mine and still running at that. Finally got the right spark tester and started testing spark every time I cranked and found spark not good all the time and finally stopped firing. Searched on line and found a fellow that tells how to do some simple test from switch on. Test showed my crank sensor was the problem. Change my distributor cap and wires around 100,000 and it still has the same cap, coil and ECM. From what I could find the ones that eat distributor caps have something not right or a less than best cap. Checked my distributor and still okay. Never had a code show what the problem was. Also checked for security causing a no fire. After changing the crank sensor I had a GM mechanic check the time or make sure the computer and sensor worked together. They have a name for the procedure but can't remember it.
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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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