I have a 06 that had a bad cp3 pump after one of freeze plugs falling out of it. Truck would start while someone else pumped the primer and quickly die. Replaced cp3 was a know good one and now can't get it to fire. Primer gets hard and when you go to crank it the primer gets soft and takes 4-6 pumps to get hard again. If the truck sits a while the primer also gets soft. Computer only shows about 250psi of rail pressure. Any ideas guys
Crank no start
- Thread starter T_Traylor1
- Start date
Had the same issue on my 06. Replaced the blender valve with a CNC, but that did not resolve the issue. Found there is no pump at the tank, only at the head of the injectors. Relays on vacuumed to pull the fuel to the cp3. Local repair suggested replacing the cp3, however could not confirm that was the solution. Elected to buy FASS fuel filter system, which removes air and contamination and incorporates a 4psi fuel pump. Problem resolved
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