Is A CP4 Injection Pump Replacement DIY Friendly? While DIY replacement of the CP4 injection pump and associated fuel system components is possible, I wouldn't exactly call it friendly.

though a faulty fuel supply pump or dirty fuel filters could also be the cause. They are usually expensive to replace, ranging up to a few thousand dollars. That’s why many diesel owners buy ...

A vehicle’s fuel system comprises components that deliver fuel from the tank to the engine, including a fuel pump, fuel lines ... that’s likely to require replacement on a schedule.

the risk of a fire, crash, or injury are increased. Dealers will inspect and replace the high-pressure fuel pump as necessary ...