91 Octane

Filled up more on gas for the logs

6:45 time is moderate acceleration. Power was breaking up and stuttering towards middle of light pull. Can see fuel trims tending lean and timing corrections getting steep. Looks to me like a vacuum leak according to data, but find no evidence of one 6:52 time is accelerating normally from stop then cruising on highway 6:55 time is idling Running 92 octane fuel, on 91ACN MHD 2+ tune. Plugs new at 0.019” gap, injectors all coded correctly and validated, coil packs are eldor and just over a year old, compression was last measured at 169-179.