Sputtering at WOT 2nd - 3rd Shift

Cole92ton

New Member
Jan 13, 2021
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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 frequently when the engine and trans are hot or when there is a lot of added weight (i.e. passengers or full gas tank). Running MHD Stage 1+ tune.

Datalog: https: //www.spoolstreet.com/graphs/sputtering-at-2nd-3rd-shift-3-18-22.15935/?series=2,19&zoom=-7,664"]Sputtering at 2nd - 3rd shift 3/18/22

Things to note upon shift into 3rd gear:
- Low pressure fuel sensor readings look low, not sure.
- 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 is steady around 13

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