Jump to content

Surging

bshort
 Share

Recommended Posts

bshort Enthusiast

bshort

Posted
Posted

19 SLT 6.2. 

 

I was was driving down the highway and noticed the engine would surge up and down about 150 rpm. I set the cruise to make sure it wasn’t me and it still did it. Didn’t matter the speed the cc was set at. No cel and everything seems to be operating as normal. Is this a part of DFM?  If so, this will get annoying in a hurry. 

steve841 Enthusiast

steve841

Posted
Posted

There are any number of software updates you probably need ...  visit the dealer, most are undeclared "recalls"

bshort Enthusiast

bshort

Posted
  • Author
Posted
2 hours ago, steve841 said:

There are any number of software updates you probably need ...  visit the dealer, most are undeclared "recalls"

I would think they were all done when I took delivery 25 days ago. 

steve841 Enthusiast

steve841

Posted
Posted (edited)

Call service and give your VIN.  Ask them if any updates are noted.

 

they are not traditional recalls the dealer must address before delivery...

Edited by steve841
bshort Enthusiast

bshort

Posted
  • Author
Posted
On 5/11/2019 at 5:31 PM, steve841 said:

Call service and give your VIN.  Ask them if any updates are noted.

 

they are not traditional recalls the dealer must address before delivery...

Stopped by the dealer today. They said there were no bulletins to address the issue. I might just have to leave it with them a day. 

  • 3 weeks later...
gt tangerine Enthusiast

gt tangerine

Posted
Posted

My 2016 did this and was annoying as heck. I was told that everything was operating normal. My 19 does not replicate this and I am grateful. I never figured out why the 16 did that with the cruise being on. 

  • 1 year later...
  • 2 months later...
Dallas Kiezik Enthusiast

Dallas Kiezik

Posted
Posted

Drive home seemed a little better, rpm fluctuation still happened a dozen times or so, apparently it’ll get better and smoother within the next 100kms.

  • 1 year later...
Dman10 Enthusiast

Dman10

Posted
Posted

I was direct messaged if it worked, seems to have corrected the issue.

they also did a throttle body reset and the afm torque management all seem to be a part of it. But yes it did smooth out there are some surges but it’s as cylinders drop and it’s less frequently.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,902
    Total Members
    8,960
    Most Online
    whenindoubtuseahammer
    Newest Member
    whenindoubtuseahammer
    Joined

  • Who's Online   1 Member, 0 Anonymous, 293 Guests (See full list)

  • Latest Articles

  • Posts

    • davester
      My First Project and GMC has me stumped

      By davester · Posted

      are there any codes? with lots of rust, perhaps disconnect/clean both sides of the connection/examine cable ends (the wires) for corrosion going into the sheath & replace if necessary/reconnect ALL the power AND ground cables between the battery, engine, frame, cab, fuse box and starter charm.li (website) has a no-start diagnostic procedure you can work through to get it working.
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      Its no wonder you've gravitated to the oil types and brands you have in later years after trying certain brands and one being a specialty oil or at least very hard to come by up here and the other would have been a commonly found oil of the era and the vastly different outcomes as a result to using the vehicles in question the same distance for an OCI . It shows what marketing hype can do without actually having the product to back up the claims and that is no different now with the insane claims that are written on the side of a bottle of oil from some of the off the shelf oils.    What has surprised me and I was already finding this out before I bought my truck with the GDI engine, that this newer fancy technology that seemingly would suggest better fuel economy/emissions with this high pressure spray of fuel is not in reality kind at all to the engine or at least the oils life. Yet they insist on claiming long OCI with this technology just like they did with the port or similar type fuel injection systems when in reality its a step back in oil life to have a GDI system.    I think the mistake your making Grumpy is that your not sending your samples to Blackstone and getting the feel good glowing report that you can run it another 1000 or more miles and then send another sample where they say run it yet another 1000 miles and on and on it goes until your sending in something that looks a lot like road tar and then they may suggest you change your oil within the next 1000 miles 😆
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I am guessing that engines of that design back then had a better ability to be abused and survive longer than a new design engine with the long timing chain and the overhead cams and phasers etc. But I would never guess that an engine could go that far and not fail spectacularly or at least die a slow death. 
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      In the 80's 90's I'd run Honda's 7,500 miles between changes using Red Line HP 5W20 and do it for hundreds of thousands of miles with issues. Back in the day it was an SAE 20 with the HTHS of a SAE 30 and SN add load. It was also very polar. Oxidation VOA was over 120. Besides those motors were SPFI and lean burn tech. I could have likely run it longer but never did.    We had a Toyota bought new I ran on Pennzoil's latest and greatest synthetic of the day with "Penthane". A made up word for a very low dose of PAO. Tried 7,500 mile OCI's in that Group III/VI chemistry and the rings tapped out at 90K. Rocker box wasn't as bad as the one Punch put up but it wasn't good either. Also a SPFI motor.    I'm around 3,750 across the board on these GDI monsters and the oil it tapped out by then usually on TBN/TAN crossover and color. Red Line HP Euro.    The AMSOIL SS brochures tell you to follow the OEM values for the service class but that it can be run up to 25K if monitored. I can't imagine what motor could go that distance and not tap out. I've never owned one.    Yes, I know. Lot's of people do. I'm just not going to be one of them. 
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      I knew a guy in the early 80's that bought a new Monte Carlo and ran it a 100,000 miles without ever changing the filter or the oil. Just kept adding. It looked like that inside.     

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...