If your engine is the 6.0 liter, you can get to the glowplugs/harness from the outside of the cylinder heads below the valve covers. On an IH vehicle at key-on time , each bank of glowplugs (4) pulls 52 amps, drops to 34, then 16 and finally cut off. If you can remove the harness from the head and ohm out each glowplug they should have 1-1.5 ohms resistance if I"m not mistaken. The amp draw test will tell you quicker than anything else if you have bad ones. Hope this helps.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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