What is defueling on a Duramax?
What is defueling on a Duramax?
Defueling is when the PCM sees something wrong with the operation of the motor and restricts the fuel in order to protect its self. Some causes are over boost, high EGT’s, high IAT’s, etc. etc.
Who is the best Duramax tuner?
6 Top Best (2011, 2012, 2013, 2014, 2015, 2016) Duramax Diesel Tuner Comparisons
| IMAGE | PRODUCT | EDITOR’S RATING |
|---|---|---|
| TOP PICK | 85400 Edge Diesel Evolution CTS2 | 9.7 |
| Bully Dog 40420 GT-Platinum Diesel Performance Tuner | 9.5 | |
| DiabloSport 8245 inTune i3 Platinum Performance Programmer | 9.1 | |
| Hypertech 32501 Max Energy Power Programmer | 8.8 |
What happens when a Duramax engine goes down?
Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.
What causes a Duramax injection pump to fail?
As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.
How can I Keep my Duramax Diesel pump healthy?
However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.
Are there any problems with the LB7 Duramax?
It is extremely important to have the heads surfaced flat before putting the truck back together. Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump.
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.
However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.
What kind of transmission does a Duramax diesel use?
It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.
Why are the Pistons on my Duramax not working?
Low-quality castings from its suppliers and a reduced amount of meat present in the wrist pin area (thanks to the use of wrist pin bushings) are to blame for factory piston failure. In most cases, the cast-aluminum piston cracks along the center line of the wrist pin, as shown above.
