Caterpillar 4 cyl diesel pre combustion cup

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You would have to have it to the govenor also to make it do this.Passed all the Injector and ICP tests.So Pulled the fuel return off put it in a five gallon bucket and Had someone mash it down to the govenor and it poured Air bubbles out of the return line.Checked the Torque on all of the Inj holdown bolts and got 10' lbs more till it clicked off on 4 out of 6.CAT said pull them all.Every cup had some combustion residue in it.Two of them were badly trashed with carbon and you could see where the gases were blowing up around the Inj body and up past the bottom o-ring into the fuel well.

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Had a wierd one with this Engine.05 C-7 ACCERT would only miss under load only and not all the time.

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