Why was the 9th injector introduced in the Duramax LML?
The Duramax LML introduced the “9th injector” system in order to supply fuel to the DPF during regeneration. This is opposed to the previous generation’s (LML) late/post injection technique.
What kind of pump does a Duramax cp4.2 use?
Like all Duramax engines from ’01-’10, the LML was also void of a lift pump from the factory. This means that not only does the CP4.2 have to pressurize fuel as high as 29,000 psi before sending it to the rails, but it also has to pull its low pressure fuel from the tank.
What causes the injector on a Duramax to leak?
Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.
What kind of fuel does the Duramax LML use?
Speaking of fuel, the LML was the first Duramax to be able to run on a B20 blend of biodiesel. With its advertised output of 397hp and 765 pounds of torque, the LML was the most powerful Duramax to date.
What happens when a Duramax CP4 pump fails?
CLICK HERE to purchase our LML CP4 High Pressure Fuel Pump Failure Kit The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates.
Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.
Speaking of fuel, the LML was the first Duramax to be able to run on a B20 blend of biodiesel. With its advertised output of 397hp and 765 pounds of torque, the LML was the most powerful Duramax to date.
Are there any problems with the Duramax engine?
The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.