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Discussion Starter #1
I've browsed a number of other topics that sound similar, but not identical so apologies if I've misinterpreted and am reporting in the same thing.

Many times (but not all) when I am under light/medium acceleration the engine RPMs flutter just before shifting. This most often seems to happen between 1500 and 1750 RPMs and is just before shifting. The fluttering seems to be 50-100 RPMs up and down. It doesn't seem to be a transmission or torque management thing like others report.

If I accelerate faster and thus stay in the 1500-1750 range for less time, it doesn't seem to occur and if I accelerate much slower so the transmission shifts at/before 1500 RPMs, it doesn't occur.

My truck has a build date of 4/2016. I've attached a video so you can see the tach and can hear the engine if you turn up the volume high enough. You can see the fluttering about 20 seconds in. I've had it do slightly worse than what the video shows but it's never terrible, a bit annoying though. Curious if others are experiencing this?

https://vimeo.com/170641848


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from the looks of it that is from the computers talking with each other trying to sort out what your doing with the intended shift points, because your not hard on the pedal its trying to figure things out. Should i shift early or wait is he going to hit the throttle a bit more is he letting off...
my truck does this too, so ive just come down to the idea of dont feather the pedal because its annoying, giver beans everywhere lol.
 
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An annoying, hopefully reprogrammable, feature of the engine / automatic combo. The Tundra didn't have that annoying trait, the pairing was impeccable.

That's the only thing making me long for a 6 speed manual in this truck...
 

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Have the same issue, thought it was a feature of being new and in learn mode. At 1361miles, it should have a better idea one would think. I don't know if its a product of transmission related shudder or the fueling. Do me a favor and while in Park, very slowly raise the rpms to about 2k. Just want to see if your engine hunts like mine till about that speed. Meeting with reps on Friday to hash out some issues. Like to see if more folks have this issue.

BigRed
 

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Discussion Starter #6
There is comfort in knowing that others are experiencing the issue.

This morning when that video was taken I did not have the AC on. I believe it may be slightly worse with the AC on. It may also be slightly worse after the engine is warmed up too. I've not proved either of those conclusively though.

I'll try revving it in Park tonight when I get home.


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I have this exact issue!! (speaking from a symptom point of view)

But to make it more interesting I have the 5.6 engine. Only does it during light throttle, most of the time it's about as shown in your video but has fluttered by as much as 300-500 rpm until it figures out what to do.

Please keep us updated with your findings.
 

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I have this exact issue!! (speaking from a symptom point of view)

But to make it more interesting I have the 5.6 engine. Only does it during light throttle, most of the time it's about as shown in your video but has fluttered by as much as 300-500 rpm until it figures out what to do.

Please keep us updated with your findings.
My 5.6 does it too, not as bad. Mine seems to do it from 2nd to 3rd, or like I like to compare it to, 2nd to 4th as it seems. Only does it I when light in the throttle. Drops from about 2k to 1300 RPMs then flutters up to around 1500. I have discovered that this 5.6 requires constant acceleration on gas pedal through the gears until desired speed, my 04 Titan you could hold the RPMs steady and let the truck speed up to catch up.
 

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dmcgaugh,

"I'll try revving it in Park tonight when I get home"

Please do....it'd be interesting to see if yours does the same thing. But by the sounds of this particular issue, sounds like a form of torque management maybe or the TCM playing catch-up to the throttle input??? Odd being the same symptoms with two completely different engines and transmissions exhibiting the same characteristics. Without digging into the programming I'm stumped, no way to read the tea leaves not having access to real-time data.

BigRed
 

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There is comfort in knowing that others are experiencing the issue.

This morning when that video was taken I did not have the AC on. I believe it may be slightly worse with the AC on. It may also be slightly worse after the engine is warmed up too. I've not proved either of those conclusively though.

I'll try revving it in Park tonight when I get home.


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I agree, not that I would wish a potential issue on anyone but seems more likely to get resolved if many report it. I was hoping it would go away with miles but doesn't seem to be after 2000 miles.

Mine does seem to be worse once everything is warmed up. Also as well as when going slightly up hill.

I wonder what could be in common between the two from a programming perspective
 

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Totally off topic, but how did you get that beeping sound to appear when you are signaling a turn? I have the Pro4x with Utility Convenience and Luxury Package.
 

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Totally off topic, but how did you get that beeping sound to appear when you are signaling a turn? I have the Pro4x with Utility Convenience and Luxury Package.


That's the blind spot/lane change warning.


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Do you now if this is included in my vehicle if it includes all of those packages, and if so how can I turn it on? I have the around view sonar detectors and checked the manual but I can't find it anywhere there...
 

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Your truck is probably not equipped with it. I've got a "early production" pro4x and it doesn't have it. If you look at the flyer on these trucks it says "optional equipment on later models" it would be nice if there is a flash to get it to work but I dunno I'm not a Nissan tech
 

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I just read that in the catalog as well. That this is a late availability feature. That really sucks. If anyone knows please let me know if they can flash. From the looks of it, it will require the mirrors to be switched out.
 

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Confirmed, no fluttering while in Park. The only RPM variation in the video is caused by my foot. https://vimeo.com/170721678


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Crap, guess I have an issue then, yours is spot on, mine sounds like a dang Detroit on a cold morning. Hunts like crazy. Guess I'll find out on my Friday morning meeting with nissan and cummins on what the next step is. Thanks!

BigRed
 

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https://www.youtube.com/watch?v=kAlDZTDf3Yk

Here's a video of my issue, mostly prevalent when it's not up to operating temp. But I find that it is also noticeable in the same band during travel in drive and with little throttle input. Same hesitation or stutter during the transition through the lower gears. Hopefully Cummins or Nissan can shed some light on it. I had my ECU reflashed, have no idea of the version, but still drives with the same issue and throttle response is still a head scratcher. Even if the smaller High pressure turbo takes a second to spin up, there is no reason that the engine operating on no manifold pressure can't start the truck on it's way and get the surge of power that second later. It's just crazy there is so much lag, especially when you slow down to around 10mph to take a corner then getting back into the throttle. It's closer to 2sec or more for it to figure out what to do. I wish we could get a real honest to god Cummins rep from this division to chime in and us giving them the driver input they crave so much!


BigRed
 

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I know there are far more software parameters in this truck that the computer monitors, but the 5.9 Cummins had similar issues when the CKP was failing. Caused hunting and throttle issues, and an RPM variance just like that. I don't know what sensors this engine has for fuel management. This discussion makes me realize I need a shop manual.

MB
 
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