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cosmo888

By cosmo888
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cosmo888 New Member

cosmo888

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joined in hopes of figuring this thing out. 1400 dollars deep and still nothing. started out as a squeek in the engine mechanic said flywheel was cracked. better for a couple days then started again and brought the PO300 code with it. not sure why the random misfire code though, its a miss in #1 and #3 almost constantly. replaced plugs and wires, nothing. swapped coils, injectors, even O2 sensors from side to side trying to get the miss to switch cylinders, nothing. mechanic said probly valves or pistons. stripped it down rebuilt the heads pistons appeared to be fine put it back together today, still have the code still misfiring....stuck!!!

8.1HD/ALLISON Senior Enthusiast

8.1HD/ALLISON

Posted
Posted

The squeak would scare me. I have seen lifters turn sideways in the holders and scrape the camshaft. Then procedure to wear out a lobe in a hurry. Those usually start out as a squeak that sounds like a belt.

cosmo888 New Member

cosmo888

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The squeak would scare me. I have seen lifters turn sideways in the holders and scrape the camshaft. Then procedure to wear out a lobe in a hurry. Those usually start out as a squeak that sounds like a belt.

 

 

Appreciate that feedback. Never thought to dig that deep while I was in there. Do you think that sqeak could turn to a clatter when the lobe starts wearing down? Sqeak is pretty much gone but I have a wicked clatter in higher rpm ranges.

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