[cole92ton]

Hi all,

Been having this issue recently. At wide open throttle, typically when shifting from 2nd to 3rd gear, my car will begin to sputter and ping, almost as if it's hitting a limiter. It's a difficult condition to describe, so I've attached a datalog. It happens more often when the engine and trans are hot or when there is a lot of added weight (i.e. passengers or full fuel tank). Running MHD Stage 1+ tune.

Datalog: https://datazap.me/u/cole92ton/sputt...og=0&data=3-20

Things to note upon shift into 3rd gear:
- Low pressure fuel sensor readings look low, can anyone confirm?
- Abnormal cylinder timing corrections across all cylinders
- Throttle position is closing while accelerator pedal is at 99.6 position
- Lambda bank 1 shoots up to around 23.5, lambda bank 2 is steady around 13

Feel free to ask any questions. TIA for any help!

[Saif2018]

Originally Posted by cole92ton

Hi all,

Been having this issue recently. At wide open throttle, typically when shifting from 2nd to 3rd gear, my car will begin to sputter and ping, almost as if it's hitting a limiter. It's a difficult condition to describe, so I've attached a datalog. It happens more often when the engine and trans are hot or when there is a lot of added weight (i.e. passengers or full fuel tank). Running MHD Stage 1+ tune.

Datalog: Have been trying to insert a link to the datalog, but haven't been able to without the link being censored by the forum software. Help?

Things to note upon shift into 3rd gear:
- Fuel pressures look normal
- Abnormal cylinder timing corrects across all cylinders
- Throttle position is closing while accelerator pedal is at 99.6 position
- Lambda bank 1 shoots up to around 23.5, lambda bank is steady around 13

Feel free to ask any questions. TIA for any help!

Have you uploaded to Datazap.me?

https://datazap.me/u/shelim2020/stag...og=0&data=3-23

Here's my Stage 1+ v9 log from way back, it's not censured

[cole92ton]

Originally Posted by Saif2018

Have you uploaded to Datazap.me?

https://datazap.me/u/shelim2020/stag...og=0&data=3-23

Here's my Stage 1+ v9 log from way back, it's not censured

I updated the post with a link of the log uploaded to DataZap rather than *********** and it no longer censors the link, weird. Thank you for the solution!

[Saif2018]

Originally Posted by cole92ton

I updated the post with a link of the log uploaded to DataZap rather than *********** and it no longer censors the link, weird. Thank you for the solution!

No worries,

LPFP is low, drops to about 50psi but it's not dangerously low and more importantly huge timing corrections and possible injectors leaking is of more concern.

First thing, Have you changed plugs and coils recently?

If you haven't, it's a good idea to do so, (OEM Bosch 3 prong plugs+Eldor or Delphi Coils.)

Your bank 1 injectors could be leaking,

Pull the spark plugs and see if any are wet or smell of fuel. If none of them are wet or smell of fuel or caked, swap them (bank 1 to 2 and 2 to 1) and see if AFR issue follows.