So, here is the story. The MPG Max system I purchase new from you has not worked properly since day one. The system floods my truck by injecting too much boost fluid. The struck stumbles, smokes horridly, and hardly accelerates from a stop. I’m told that I need to purchase a second solenoid to shut the system off to prevent drain back from the reservoir into the engine. I drop $50 and purchase one from you. Upon install, the system acts the exact same.
I’m then told that is it physically impossible to flow that much fluid through the 175 nozzle the system comes with (1 gallon fluid per 1.5 gallons of diesel). Being skeptical, I decide to test this theory. I run a long tube from the injection system, post solenoid, from under the hood into the cab of my truck and mount the 175 ml nozzle an empty 1 gallon bottle on the floor in the cab of my truck. At 25 miles of light city driving, the bottle was full from the injected fluid from the 175 ml nozzle. I remove the bottle and use it to refill the primary reservoir. It toped off the primary reservoir completely thus proving that every ounce of fluid injected within 25 miles was indeed through the 175 nozzle and not leaking or going somewhere it shouldn’t. I also posted questions on the internet concerning my problems. Another LBZ Duramax owner reported the same systems. His went with a much smaller nozzle, 100 ml.
A secondary problem arose upon doing the above bottle test. I noticed that the solenoids did not open at the proper boost setting. For example, it was set to open at 5 PSI, however the solenoid did not open till the pressure was 2-3 psi above that boost setting. Thus, when I drive at 6 psi boost and the controller says it’s injecting about 28%, however, it truly is not. The pump, which is pumping, is dead heading against the closed solenoid. This was very repeatable. Once the solenoid opened at 7-8 psi, you could back down on the boost to 5-6 and it would stay open. The problem is the opening on the proper boost setting.
Your next suggestion was to inspect the solenoids. I pulled them at your store in the parking lot with your help and you attempted to disassemble them. It was close of business and you couldn’t pull them apart. Your tool kept slipping. You said for me to take them home and clean them. I did this and also pressure tested them. They held pressure fine with no leaking at 150 psi.
During your bench testing on the solenoid not opening at the proper boost setting, you suspected the solenoid. Upon conclusion of your bench testing your recommendation was for me to purchase new solenoids. I needed to purchase new ones since I had opened then up and voided the warranty. That is total BS and I’m still stuck with a system that will not perform as designed and you have not addressed any of the multiple issues I have pointed out. Do you not see the poor service I’m getting? And, I’m still stuck with the purchase of a 100 ml nozzle that helps with the flooding problem since the included one is useless. My truck makes 30 psi boost however, I’m running the mpg max on the MPG mode with the setting at 5 -63 psi boost (system max) to keep from flooding and not seeing much/any increase and using a crap load of fluid at recommended setting. I’m never exceeding 35% injection with a 100 ml nozzle and still using a ton of fluid, over 12 gallons per tank of fuel running empty/not towing. I fail to see how this is anything near cost effective. After many trips to your store, gas money to Woodland Park, useless expensive solenoid purchase, malfunctioning system, horridly non-cost effective use of fluid, you want me to purchase more products (solenoids) from you to allow you to do more trouble shooting at my expense?
I’m then told that is it physically impossible to flow that much fluid through the 175 nozzle the system comes with (1 gallon fluid per 1.5 gallons of diesel). Being skeptical, I decide to test this theory. I run a long tube from the injection system, post solenoid, from under the hood into the cab of my truck and mount the 175 ml nozzle an empty 1 gallon bottle on the floor in the cab of my truck. At 25 miles of light city driving, the bottle was full from the injected fluid from the 175 ml nozzle. I remove the bottle and use it to refill the primary reservoir. It toped off the primary reservoir completely thus proving that every ounce of fluid injected within 25 miles was indeed through the 175 nozzle and not leaking or going somewhere it shouldn’t. I also posted questions on the internet concerning my problems. Another LBZ Duramax owner reported the same systems. His went with a much smaller nozzle, 100 ml.
A secondary problem arose upon doing the above bottle test. I noticed that the solenoids did not open at the proper boost setting. For example, it was set to open at 5 PSI, however the solenoid did not open till the pressure was 2-3 psi above that boost setting. Thus, when I drive at 6 psi boost and the controller says it’s injecting about 28%, however, it truly is not. The pump, which is pumping, is dead heading against the closed solenoid. This was very repeatable. Once the solenoid opened at 7-8 psi, you could back down on the boost to 5-6 and it would stay open. The problem is the opening on the proper boost setting.
Your next suggestion was to inspect the solenoids. I pulled them at your store in the parking lot with your help and you attempted to disassemble them. It was close of business and you couldn’t pull them apart. Your tool kept slipping. You said for me to take them home and clean them. I did this and also pressure tested them. They held pressure fine with no leaking at 150 psi.
During your bench testing on the solenoid not opening at the proper boost setting, you suspected the solenoid. Upon conclusion of your bench testing your recommendation was for me to purchase new solenoids. I needed to purchase new ones since I had opened then up and voided the warranty. That is total BS and I’m still stuck with a system that will not perform as designed and you have not addressed any of the multiple issues I have pointed out. Do you not see the poor service I’m getting? And, I’m still stuck with the purchase of a 100 ml nozzle that helps with the flooding problem since the included one is useless. My truck makes 30 psi boost however, I’m running the mpg max on the MPG mode with the setting at 5 -63 psi boost (system max) to keep from flooding and not seeing much/any increase and using a crap load of fluid at recommended setting. I’m never exceeding 35% injection with a 100 ml nozzle and still using a ton of fluid, over 12 gallons per tank of fuel running empty/not towing. I fail to see how this is anything near cost effective. After many trips to your store, gas money to Woodland Park, useless expensive solenoid purchase, malfunctioning system, horridly non-cost effective use of fluid, you want me to purchase more products (solenoids) from you to allow you to do more trouble shooting at my expense?
