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Cylinder #6 not firing

3146 Views 12 Replies 4 Participants Last post by  Bill1013
My PSD has a miss. Took the valve covers off to determine which cylinder wasn't firing. #6 cylinder no change in the sound of the engine when I pull the injector wire off. The rest of them caused the engine to stumble even more when I pulled the injector wire off. I replaced the under valve cover harness on both sides with the newer style with integrated harness. Then ohmed the injector and that was good. Checked resistance from #6 all the way to the ECM with no breaks in the wire. Now I'm stumped. The rig only has 102K miles on it (motorhome) so I'm leaning away from a bad injector. Any thoughts?
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You can measure the armature gap. Is the injector is spitting oil when running? You can always swap the injector with an other one to see if the problem follow the injector or stay on the same cylinder.

Do you have a powerstroke capable scanner?

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this will help you Valve.pdf

sorry I try to reply earlier but I guess i never press send lol
yap that would do the trick LOL

glad you got that under control
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