Hey guys,,, I'm messing with a 2008 6.4,, I have 230 psi lower compression in #8 than #6. I'm wanting to check if the injector is sealing the combustion chamber. Can you guys point me in the right direction. Should the schrader valve on the fuel cooler show pulses of exhaust if its the injector. Where do I test for combustion in the fuel?? Thanks guys

 

Lots of sludge residue around the upper fuel filter.

 

Thats not a motorcraft filter…..I would change them out, what is the issue you are having?

 

Oh man,,, this truck is having its day under the knife. Here is what my compression numbers are. These are actual not relative.



Most of you guys know what is in store for this truck huh.

 

Here are the symptoms.

Misfire on #1 cylinder,, not recurring,,, yet????
Cont/bal cyl #8 ,,,,, this is recurring
Misfire on #8,,,, not recurring
Runs fine most of the time,,, then it starts stumbling until the ignition is shut off n restarted.
Does that white sludge on the filter cap look like biofuel residue ?????

 

I run lots of biodiesel I buy at a commercial pump and have never seen that, almost looks like someone used white grease on the threads?

 

Maybe it's a water/diesel sludge thats developed since there is no water blocking membrane?