GOT A BUDY AND DEALER SAYS # 1 CYCLINDER HAS NO COMPRESSION AND THEY WILL NOT WARRENTY HIS TRUCK, I THINK IT IS A INJECTOR THAT IS FAILING THEY DID LEAK DOWN TEST THEY SAY RINGS ARE NO GOOD. I FEEL THAT IT IS AN INJECTOR HANGING OPEN TRUCK RUNS, BUT LIKE CRAP ANY FEED BACK WILL HELP ! QUESTION IS IF INJECTOR IS HANGING OPEN CAN IT CAUSE ZERO COMPRESSION IN CYCLINDER !

 

zero compression? If the injector is bad, it probably caused the piston to melt, causing the rings to break, causing zero compression. Just my .02c