My truck has been down on power for a long time now so I finally did a compression test. The #3 cylinder only had 40 psi and the #4 cylinder was only 90 psi. The remaining cylinders were all around 125 psi. The funny part is that the truck actually runs pretty good. It has no power but untill I get around to rebuilding the motor I can still drive it for now when I need to. I'm not planning on going crazy with the rebuild. The only parts that I plan on upgrading will be the rods and pistons This is not a daily driver but I still want it to be right so after the holidays I'll probably get started.