2014 Silverado hesitation when accelerating from stop

[pokismoki]

did you add aftermarket airfilter,? try cleaning the MAF?

 

try driving in 5th instead of drive, then try using tow haul if it still hesitant?

[MisfireMagnet]

7 hours ago, pokismoki said:

did you add aftermarket airfilter,? try cleaning the MAF?

 

try driving in 5th instead of drive, then try using tow haul if it still hesitant?

Nothing aftermarket, truck entirety stock.

MAF cleaned and then replaced after strange temperature reading.

Manual shifts fine but starting hesitation still present.

Tow/haul doesn't have any effect, except higher rpm.

[MisfireMagnet]

9 hours ago, ic3man5 said:

You need to turn the engine off and with the key on push the throttle all the way down (WOT). It should be around 80-85%. Bottom should be around 10-20% I believe. You won't see 0-100%.

Okay, I got a reduced reading. There is a graph a few posts above yours that shows my absolute throttle position percentage engine-off but key-on and it goes from about 20-48%

When driving the percentage does go up higher than that range.

[ic3man5]

2 hours ago, MisfireMagnet said:

Okay, I got a reduced reading. There is a graph a few posts above yours that shows my absolute throttle position percentage engine-off but key-on and it goes from about 20-48%

When driving the percentage does go up higher than that range.

Sorry I missed that, 2014 were known for bad grounds (especially the one right above the steering wheel in the dash). I feel you have too many intermittent issues here where I'd start questioning the scanner itself. Does the truck run to 5-6K RPM when you go wide open? 48% throttle would feel really really slow even if it hit those RPMs.

 

edit: Here is a video to compare to around how quick it should be gaining speed: 

 

Edited April 2, 2021 by ic3man5

[MisfireMagnet]

Just now, ic3man5 said:

Sorry I missed that, 2014 were known for bad grounds (especially the one right above the steering wheel in the dash). I feel you have too many intermittent issues here where I'd start questioning the scanner itself. Does the truck run to 5-6K RPM when you go wide open? 48% throttle would feel really really slow even if it hit those RPMs.

Yes, it will get to 6k rpm on the highway and the throttle position I have seen get to approximately 80% 

[ic3man5]

Found some logs showing TPS, hopefully this helps:

 

Moving off the throttle: 14.8%

 

WOT 83.9%

[pokismoki]

try doing a throttle clean proceedure basically a tb re-learn

 

Edited April 3, 2021 by pokismoki

[MisfireMagnet]

Update: Took to dealer and they said the torque converter failed and destroyed the transmission along with it. They will attempt a repair or more than likely just replace entire thing.

[rav3]

Glad to hear you/they found the issue. Will GM cover this under the drive train warranty?

[MisfireMagnet]

The dealer said no it's out of warranty for time even though it only has 33,000 miles on it.

 

I called GM and hopefully they will do something since if I had driven it a normal amount then it probably would have failed within the warranty period.