How do I tell what injectors my Duramax has?
The answer is to examine the injector connector ‘keys’ to help correctly identify the year and model of engine you are working on. The ‘LLY’ engine (2004 – 2005) is the first year to use connector ‘keys’ (note the circled portion). You can also check the 8th digit of the V.I.N. to confirm it is a ‘2’ or a ‘3’.
What are good injector balance rates on LB7?
GM states that balance rates should be no more than plus or minus 4 (+4/-4) in park at operating temperature. Unfortunately balance rates do not always provide a 100% accurate diagnosis of the injector’s performance due to numerous variables present in the engine.
What do the numbers on a fuel injector mean?
Fuel Injectors are sized by their flow rate. Flow rate is a measurement of how much fuel can be delivered over time. It is listed in pounds per hour (lbs./hr.) or cubic centimeters per minute (cc/min.). The right size injector can supply enough fuel under full load conditions at an 80% duty cycle.
What is the 9th injector on Duramax?
9th Injector Fuel injector, located in the exhaust before the DOC, raises exhaust gas temperatures during Active Regen. DEF Deisel Exhaust Fluid, used to treat NOx emissions, sprayed in the exhaust after the DOC and before the SCR.
How do I know if my injector is bad LB7?
There is a multitude of symptoms your truck will experience if the injectors are going bad. One of the first signs we see are excessive smoke/haze. You will notice your truck billowing out a little more smoke than usual or hazing at idle. Another issue you may notice is high EGTs.
How do I know if I have LML or L5P?
The Duramax engine has evolved from the original LB7 series to include the LLY, LBZ, LMM, LML/LGH, and now the L5P series. The simplest way to verify which series Duramax you have is interpreting the VIN# of the truck. With some exceptions, the 8th digit is the engine ID and it will either be a 1, 2, D, 6, 8, L, or Y.
How do I identify my injectors?
The majority of diesel injectors are made by Bosch and the part number is usually found on the pin connector unit above the O ring , however on some injectors they will be on the main body. Petrol injectors tend to have part numbers stamped on the side of them.
Are fuel injectors numbered?
Fuel injectors are numbered to correspond with the number assigned to the cylinder that they serve. The manufacturer determines the numbering of the cylinders.
What is the L5P Duramax?
The L5P duramax is the latest version of the Duramax V8 diesel engine. (engine code Y) Introduced in the 2017 model year it is the most powerful diesel pickup truck engine GM has produced with 445 hp (332 kW) at 2,800 rpm and 910 lb⋅ft (1,234 N⋅m) at 1,600 rpm.