Jtm454

That’s the weird thing I have absolutely no blow by no weird noticeable smoke we didn’t run it for long after we noticed the issue due to obvious concerns

It is a cv713 chassis the cam and lifters have all been replaced

Sorry I missed the specifics on the engine I could get a serial number if needed any input appreciated it at least gives us some ideas

The engine is a 2005 I was under the assumption it was an e tech, it does have engine brakes, I know a bad injector could cause a misfire but could it cause what seems to be a loss in compression?? This truck has been an absolute nightmare, it was taken apart by another mechanic that went awol after getting it apart so we had to piece this entire thing back together several pieces were mismatched and robbed to be used on other trucks, and from what we have now learned we believe an injector was taken from the parts pile and used in another truck that had a bad one so we are assuming we know we have at least one bad injector in there, I’ve purchased the compression testing tools so we will have it out anyways,

We did do valve adjustments strictly by the book, and haven’t attempted cracking the fuel lines we just remove one wire per unit pump was hard to tell any difference at all, and yes the engine does have engine brakes

Have a Mack e7 dropped a valve we pulled it apart found the piston beat up decided to overhaul, we also found the cylinder that dropped the valve had Chunked a lobe in the cam, we replaced the cam and cam bushings timed by the book, two reman heads from Mack put it all back together we have a misfire, and a uneven crank you can tell a cylinder is dead have rechecked rack adjustment several times unsure where to go from here but has a noticeable drop out when cranking reman Mack cylinder packs, im thinking may have a ring issue, not sure if I’m over looking something somewhere any help is appreciated thanks