So i got this truck from a customer and it hasn't ran in 7 years it was parked cause the Trany went out. So here's what I've done new cps new plugs and wires cap coil Rotter new trany fuel tank dropped and cleaned new gas did compression. Test check timing and everything came out great but it still only runs off three cylinders please help

 

Welcome to DF! Need some more info on your truck, miles, engine size, drivetrain, etc. However, your better off posting this quesiton in the appropriate section for your truck, in this case, the 2nd gen Ram section. This section is for reporting problems/suggestions for the dodgeforum internet site.