GreyMetric
New member
Dealing with a truck that starts perfectly when cold but cranks forever once it’s warm is incredibly frustrating. How do you track down a warm hard-start issue on an early 6.6L Duramax before it leaves you stranded, and what fuel rail pressure specs are you looking for to verify a healthy pump?
Are you typically finding worn-out injectors returning too much fuel to the tank, or is a tired CP3 pump losing its efficiency as the fuel thins out with engine heat? I’m curious what diagnostics saved you from firing the parts cannon？
Are you typically finding worn-out injectors returning too much fuel to the tank, or is a tired CP3 pump losing its efficiency as the fuel thins out with engine heat? I’m curious what diagnostics saved you from firing the parts cannon？
