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Trouble accelerating

romanzo

By romanzo
in Troubleshooting & Recalls

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romanzo Enthusiast

romanzo

Posted
Posted

Hey so I recently purchased a 2014 Silverado z71 with about 27k on it and for the most part it drives great, however I have noticed on occasion when I really hit the throttle the truck sort of lags before accelerating. Also it jerks sometimes when I hit the peddle lightly, like if I am in traffic or something. Has anybody had any similar issues with their trucks? Thanks!

cnet24 Enthusiast

cnet24

Posted
Posted

Yes, this is really how the trucks drive, unfortunately.

 

I do a lot of my driving in traffic and experience the jerk that you are talking about many times/day.

 

I think it has something to do with 4 cylinder/V8 flex. At one point I had an engine programming recall when my truck was new to address this, but it didn't seem to help. The most annoying part to me is the lag in accelerating- haven't noticed it in Ram/F-150 of the same year.

Sierra 5.3 Enthusiast

Sierra 5.3

Posted
Posted

Hey so I recently purchased a 2014 Silverado z71 with about 27k on it and for the most part it drives great, however I have noticed on occasion when I really hit the throttle the truck sort of lags before accelerating. Also it jerks sometimes when I hit the peddle lightly, like if I am in traffic or something. Has anybody had any similar issues with their trucks? Thanks!

Sounds like the AFM is in V4 and switches to V8 when you step on it. This is normal.

romanzo Enthusiast

romanzo

Posted
  • Author
Posted

Well I guess I am relieved to hear it is normal and not something wrong. However I would like to get rid of this. Has anybody resolved this issue with a programmer such as the diablo intune i2? I've heard you can override the v4 to v8 switch with one of those amongst other things.

aseibel Senior Enthusiast

aseibel

Posted
Posted

two easy ways to kill the v4 mode:

1). shift into Manual (M), then it won't go into v-4

 

2). buy a "range afm delete".

Sierra 5.3 Enthusiast

Sierra 5.3

Posted
Posted

two easy ways to kill the v4 mode:

1). shift into Manual (M), then it won't go into v-4

 

2). buy a "range afm delete".

What he said

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