Engine

 6.7L Ram Cummins EGR Delete Disclaimer This article is written for offroad use and/or track racing. EGR deletes are illegal for highway use in the US.   EGR Delete The first step you'll have to do is disconnect the battery grounds and drain the coolant from the radiator. You only need to drain about 1/2 the coolant out since you are only worki

CYLINDER COMPRESSION/LEAKAGE TESTS   CYLINDER COMPRESSION PRESSURE The results of a cylinder compression pressure test can be utilized to diagnose several engine malfunctions. Ensure batteries are completely charged and the engine starter motor is in good operating condition. Otherwise, the indicated compression pressures may not be valid for diagnostic purposes. 1. Disconnect the fuel inlet line to the fuel filter housing. Plug the fuel line from the fuel tank. NOTE: Failure

Thanks to chknkatsu over on CumminsForum for this one.   Took me a long to figure out how i wanted to do this without interfering with the everyday use of the truck, that meant not eliminating the spare or taking up bed space. I also wanted two compressors for quick recovery and redundancy in the case of one of the compressors going bad. I also wanted to make sure all the wiring terminations and relays were easily accessible. I sized the wires accordingly to reduce voltage drop.