The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring. #DURAMAX LB7 MASS AIR FLOW SENSOR PROBLEMS CODE# One of the biggest complaints on the LLY is it has a tendency to overheat, especially when the truck is being worked hard with a heavier trailer or on a hot summer day. While it may not be the first place you think to look, the stock air intake system can actually contribute to a hotter running LLY Duramax. Many people add a cold air intake with hopes of increasing horsepower and efficiency, but on the LLY you need to take it one step further and add a less restrictive turbo mouthpiece, a part which doesn’t come with most cold air intake kits. When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp. However, if you install a stock LBZ or aftermarket turbo inlet, you can let the engine breath freely which will lower air temps and keep the coolant temps under control.

#DURAMAX LB7 MASS AIR FLOW SENSOR PROBLEMS INSTALL#

#DURAMAX LB7 MASS AIR FLOW SENSOR PROBLEMS CODE#.

#DURAMAX LB7 MASS AIR FLOW SENSOR PROBLEMS INSTALL#.

Duramax mass air flow sensor problems