Keith Molden said: (quoted from post at 06:56:42 12/17/09) My 2000 F-250 with a V-10 engine developed a dead miss on #5 & # 10 cylinders & we can't seem to locate the problem. We've tried new coil springs & boots to the plugs, tried a new injector, pulled the valve cover on 1 side to check rocker arms. Checked for vaccuum leaks & found none.The test equipment shows no miss fire on any cylinder. Compression is 150+on all cylinders.I have it in a repair shop & the mechanic is usually pretty darned good, but he can't find the problem.I was pulling a pretty heavy load on my gooseneck when the miss developed.Just wondering if anyone has any ideas as to what it could be.Thanks, Keith
What is the compression on that engine. You may have an internal problem like a headgasket.
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Today's Featured Article - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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