What happens when a CP3 pump goes bad?
There may be a surge at idle due to low or no fuel supply pump pressure to the high-pressure pump. Knocking can be heard if the actual versus desired are too far apart which may be a bad FCA or Fuel Control Actuator.
What are the best years of Duramax?
2006-2007 2500 & 3500. Perhaps the most desired of all Duramax models are the ’06-’07 Classic body style trucks.
How do you prime a Duramax after running out of fuel?
Prime the fuel system by turning the ignition on (Run position) for 30 seconds, but do not start the engine. This allows the pump to prime the system. Turn the ignition off, and then crank it for 15 seconds. If it does not start, repeat the first task and this one until it starts (cycle the key).
How do I know if my CP3 is failing?
This is a one-stop symptom checker for issues related to common rail injectors and CP3 pumps.
- High-Pressure Common Rail Basic Information and Function.
- Do You Have No Start Or a Hard Start?
- Do You See Black Smoke?
- Can you hear Knocks?
- Do You Have Slow Deceleration?
- Is there Blue/White Smoke at Idle When Cold?
How do I know if my CP3 is going?
The rough/lope idle is caused by excessively high rail pressure at idle, if the CP3 is worn out there is NO way it would cause HIGH rail pressure, it will only come up short of commanded. A good way to check is get a scanner that reads actual fuel rail pressure. At idle it should be around 5k psi.
What is the best year to buy a Duramax diesel?
The best Duramax diesel engine year models that are safe to buy include:
- 2010 – 2017 Duramax LGH.
- 2011 – 2016 Duramax LML.
- 2011 – 2021 Duramax XLD25.
- 2012 – 2021 Duramax XLD28.
- 2014 – 2021 Duramax LWN.
- 2017 – 2021 Duramax L5P.
- 2019 – 2021 Duramax LM2.
What years are the best Duramax?
LBZ: 2006 – 2007 It has the best potential for performance and horsepower additions through various Duramax parts mods and tuning. Built stronger and more durable than previous engines, the LBZ is reliable and powerful. The only weakness is that the pistons are known to crack if you get over 600 horsepower output.
What is the best year Duramax ever made?
What are the problems with the Duramax?
Fuel Injector Failure
What are common problems with Duramax Diesel?
Long Crank Start-up Time. If your 3.0 Duramax engine takes a long time to crank up,then it may have an issue with the glow plugs or glow plug wiring
How to replace Duramax fuel injectors?
Take off everything that’s in the way, R&R the injectors, the put the stuff you took off back on. Make sure you have new injector O-rings and metric line wrenches. Do you know if you need some sort of special Injector removel tool in order to remove the injectors from an LBZ?
What is the problem with Duramax Chevy diesels?
The Duramax diesel is susceptible to fuel starvation and getting air in the fuel lines. This can be contributed to the fuel filter housing design and the fact that the Duramax does not use a lift pump. Rather, the high pressure fuel pump (injection pump) is responsible for vacuuming fuel from the tank.