'98 K2500 RCLB 454 NV4500 Daily/Hauler

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Justin S

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There's a few interesting things that started happening after I got my "box" from lextech.

I definitely got better fuel economy to start. I use "aCar" (Its an app) to track my milage and all other maintenance on my vehicles. After I installed the 0411 my average fuel economy went up 1.5mpg. So even on a base tune that makes the truck "runable" its doing better for my wallet than the black box did.

The fuel cuts out completely after you've let off of the accelerator for about 3 seconds. I suppose this has helped my milage, but nevertheless I was a little worried about what it was when it first started happening. I wouldn't mind the time delay, or whatever it is, being longer as I've found there are plenty of times where it has kicked in at the same time I've started to push the accelerator again.

I feel my acceleration and general driveability has improved. Off-idle the engine definitely runs much smoother. Idle is still choppy but I have yet to be tuned. I also have torque management turned off. Risky... but god does it feel good to lay down some stripes whenever I want to.

You can get Tow/haul mode but since you have a manual that doesn't help you at all. Something else for other people interested though: In 3rd gear, the TC will lock just like it would in 4th gear. Not sure if it did that before the swap... but it definitely happens.



What CEL do you have? For the cats? If you get a 0411 you can get that written in to be turned off. Is your pickup emissions exempt due to the weight class or anything?
Good to know, the fuel cutting off sounds weird, but if it benefits all the other ways too its definitely something to consider. The only code I get right now is for the pass side converter being gutted, but here in NY anything over 8500gvw doesn't need to be plugged in, so I just sqeak by. I messaged one company and they can delete rear o2, egr, and evap systems from my existing computer if I wanted.
 

Christian Steffen

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There's a few interesting things that started happening after I got my "box" from lextech.

I definitely got better fuel economy to start. I use "aCar" (Its an app) to track my milage and all other maintenance on my vehicles. After I installed the 0411 my average fuel economy went up 1.5mpg. So even on a base tune that makes the truck "runable" its doing better for my wallet than the black box did.

The fuel cuts out completely after you've let off of the accelerator for about 3 seconds. I suppose this has helped my milage, but nevertheless I was a little worried about what it was when it first started happening. I wouldn't mind the time delay, or whatever it is, being longer as I've found there are plenty of times where it has kicked in at the same time I've started to push the accelerator again.

I feel my acceleration and general driveability has improved. Off-idle the engine definitely runs much smoother. Idle is still choppy but I have yet to be tuned. I also have torque management turned off. Risky... but god does it feel good to lay down some stripes whenever I want to.

You can get Tow/haul mode but since you have a manual that doesn't help you at all. Something else for other people interested though: In 3rd gear, the TC will lock just like it would in 4th gear. Not sure if it did that before the swap... but it definitely happens.

Did you have a custom tune on your old ecm? I'm very interested in doing the 0411 swap and upgrading to larger injectors at the same time. My concern is that it the "base" tune won't run as well as my current mail order tune from wait4me, as it may be a few months until I get a custom tuning software, so I'm just looking for some input. (Sorry for hijacking the thread a bit)
 

65nightmare

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Good to know, the fuel cutting off sounds weird, but if it benefits all the other ways too its definitely something to consider. The only code I get right now is for the pass side converter being gutted, but here in NY anything over 8500gvw doesn't need to be plugged in, so I just sqeak by. I messaged one company and they can delete rear o2, egr, and evap systems from my existing computer if I wanted.

My truck came from the factory without rear o2 sensors.
 

Biggershaft96

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Did you have a custom tune on your old ecm? I'm very interested in doing the 0411 swap and upgrading to larger injectors at the same time. My concern is that it the "base" tune won't run as well as my current mail order tune from wait4me, as it may be a few months until I get a custom tuning software, so I'm just looking for some input. (Sorry for hijacking the thread a bit)
Dam i didnt know wait4me known outside of my area. I had him do a ride along tune for my g6. Hes only like 20 min away from me.
 

Christian Steffen

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Dam i didnt know wait4me known outside of my area. I had him do a ride along tune for my g6. Hes only like 20 min away from me.

I managed to find him at least, seems to do good work at a very fair price. I've been happy with the tune on my truck, I've been running it about 2 years now.
 

Jrgunn5150

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Good to know, the fuel cutting off sounds weird, but if it benefits all the other ways too its definitely something to consider. The only code I get right now is for the pass side converter being gutted, but here in NY anything over 8500gvw doesn't need to be plugged in, so I just sqeak by. I messaged one company and they can delete rear o2, egr, and evap systems from my existing computer if I wanted.


Not that it really matters, but I believe your GVRW is 9200, mine is 8600
 

Justin S

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ooops nevermind I didn't realize you answered that a few comments ago. For the price, I might just send out mine and have a few things tweaked and leave it at that for now.
 
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