Loose Injector
Has any one heard of the Cummins 8.3 ISC having a loose injector causing combustion products to enter the return fuel going back to the main tank and causing the fuel to turn black, then clogging filt...
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What have seen is the injector having a bad o-ring and oil getting into the return fuel line and turning the fuel dark.
I have also seen a cracked head causing Coolant to return to the fuel tank. But that is an extreme situation.
I have also seen a cracked head causing Coolant to return to the fuel tank. But that is an extreme situation.
