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6.2L Pulsar LT Weirdness


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So installed the pulsar LT on my 19 6.2L 10 Speed and I'm either confused or happy.  Adjusted the tire size to get the speedometer corrected.  Still a bit off from GPS, but not by much.  Original tires were 275/50/R22 which translates to 32.83 inches, now running 37 inch tires.  Only about 1 or 2 mphs off throughout the entire range, which I believe is acceptable.

 

Secondly decided to disable DFM out of curiosity more than anything.  Some things I noticed:

  • I have an AFE cat back exhaust:
    • The Suburu drone is gone!
  • When configuring:
    • Electronic step rails went crazy
      • In/Out randomly and including full extension (for bed access assistance)
      • Went away after starting vehicle.
  • The MPG is reporting better than with DFM enabled:
    • Like 5 MPG better in the 50 mile sample.
      • Going to need to get a full tank and take the mileage to verify on paper.

 

Anybody else get better MPG with DFM disabled?  Or is it lying to me?

 

EDIT: MPG has normalized.  Getting 11-13 mpg local, 15-18 mpg highway.

Edited by clowe1243
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I've been using the Pulsar for about a month now and I'm loving it. I'm seeing about a 1.5 mpg loss but I'm also working through some issues with my Rotofab install. I am seeing my mpg go back up and we'll see if I get into the positive number. I have a Magnaflow catback exhaust and the the drone is gone. 

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3 hours ago, clowe1243 said:

 

 

Secondly decided to disable DFM out of curiosity more than anything.  Some things I noticed:

  • I have an AFE cat back exhaust:

I just want to know if you could swap the muffler from them and get near the same results.  1400 is a bit steep

https://afepower.com/afe-power-49c44114-apollo-gt-series-3-409-stainless-steel-muffler-upgrade

 

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2 hours ago, Rob Mugs said:

I just want to know if you could swap the muffler from them and get near the same results.  1400 is a bit steep

https://afepower.com/afe-power-49c44114-apollo-gt-series-3-409-stainless-steel-muffler-upgrade

 

The key is getting rid of that flapper.  I'd imagine it can't get any worse.  Cant even tune the 6.2L at a reasonable price atm.  Ive seen some guys that just lock the flapper open.  Make it sound tons better, but without disabling the dfm...your still gonna sound like a suburu.

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Your MPG is "showing" better because your speedometer is correct now.  The truck didn't think you were driving as far before.  Also, you can get your speedometer dead on accurate.  The second number in the programming is 10ths of an inch.

 

-Eli

Edited by Tjeli
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4 hours ago, clowe1243 said:

The key is getting rid of that flapper.  I'd imagine it can't get any worse.  Cant even tune the 6.2L at a reasonable price atm.  Ive seen some guys that just lock the flapper open.  Make it sound tons better, but without disabling the dfm...your still gonna sound like a suburu.

I might cut the flapper first and then do the muffler

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On 1/13/2021 at 9:00 AM, RRonin said:

I've been using the Pulsar for about a month now and I'm loving it. I'm seeing about a 1.5 mpg loss but I'm also working through some issues with my Rotofab install. I am seeing my mpg go back up and we'll see if I get into the positive number. I have a Magnaflow catback exhaust and the the drone is gone. 

Whats going on with the roto fab

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The Suburu drone is gone! ?  yeah, can't explain it. I'm running 2 borla's in line and was still loud. So quiet now, why??  My running boards also spazzed out, all good. Only issue now is drivers side mirror keeps lighting up ghost vehicle alert.  maybe truck bug, not pulsar?

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On 1/13/2021 at 10:25 AM, clowe1243 said:
  • The MPG is reporting better than with DFM enabled:
    • Like 5 MPG better in the 50 mile sample.
      • Going to need to get a full tank and take the mileage to verify on paper.

 

Anybody else get better MPG with DFM disabled?  Or is it lying to me?

 

EDIT: MPG has normalized.  Getting 11-13 mpg local, 15-18 mpg highway.

 

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  • 1 month later...
  • 3 months later...
On 1/16/2021 at 10:59 PM, RRonin said:

I didn't torque down the hose clamps. Hose popped out after a 100 miles and my truck throw a code. 

on mine almost the same but it was my filter i got the corsa intake came of and thew a code now it wont respond the same on the level 5 even with the new filter on i don’t know if it messed up my pulsar lt or what 

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On my trailboss custom 6.2 I ended up never getting it where I liked it. Throttle sensitivity when I plaid with that made the upper gears shirt funny. And when I disabled dfm it also disabled decel fuel cutoff when I let off the throttle when scanning the truck. Plus truck had onstar issues unless I enabled dfm. So for me I wasn’t happy enough to keep it. Just my 2 cents.

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  • 1 month later...

So what I’m hearing is the Pulsar is an overpriced “investment” that may or may not make a DFM truck run better, but there’s a high chance of computer glitches. 
 

It’s bad enough that the guys at Range Technology won’t even make us a simple DFM disable (6.2 10-speed), but instead they release our only option - the Pulsar LT. However, it’s way more expensive AND not even reliable. 
 

Such BS.

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