No compression in Cylinders 4, 5 and 6 Help

You could buy a generator at harbor freight and a good battery charger with a 50amp start option. Then you wouldn't need ether.


If half your engine didn't have compression, it wouldn't run right and power would suck.

 

Would the exhaust have a strong diesel smell?

 

That's what it was. Cranks but wouldn't fire the engine. The ether helped with dry start. I researched it pretty thoroughly: could be the return valve, could be crank sensor, could be batteries or even starter, could be I lost primer etc. but the #### dealer gave me the whole cylinder issue.

 

I bought the Viking battery jumper from harbor freight. The dealership put in new batteries

 

No smell from exhaust. Only happened when I first jump started the truck in 26 degrees

 

Farmington. Yes the oil patch!

 

I cannot tell the difference with the way the truck runs, no loss of power nothing. Just the dead batteries and dry start and then the dealership telling me 3 cylinder are out of commission

 

If it is not missing or shaking I would run it. Sometimes these 'techs' are not mechanics. If 3 cylinders were dead the truck would barely run. Some of these 'techs' would be wetting their pants if you told them to hold down an injector on a running Big Cam Cummins to find a miss.

 

Thank you. Well first milestone will be tomorrow morning. If the engine fires up, then I will no at least that I won't have to worry about dry starts.

 

Note in the technician’s notes, it said the 456 cylinders “mostly” had 0’s. That is suspicious.
The test they performed was a “software” test. Basically looks at the “speed” of the cranking of the engine using the cam and crankshaft sensors. Then extrapolates a number based on the results. A cylinder with strong/high compression takes more force to move, slowing the cranking speed.

Weak batteries or starter can cause erroneous information. I note that the technician stated that they had some slow or low cranking problems during this test and stopped. Seems odd with new batteries. Potentially a starter problem?

The technician also stated that the reason they did these tests was due to a noise or popping in the intake track. This could be a valve adjustment issue. One of the first things to look at is the valve adjustment. You said it had an overhead run just recently. It may have been done incorrectly.
The description leads thoughts to valve lash too tight. Checking the top end is a lot easier than some other things and may be where your problem is.