 V2 Tune w/ new OEM HPFPThe "new" HPFP used in the run on 10/2/22 was a remanufactured unit which failed a couple days later. I replaced it with a new OEM pump from the dealer today and these are the first 2 pulls on it. It's marginally better than before, remaining just over 1000 psi. AFRs don't look like they're going lean, so is this ok? Can you see fuel injector duty cycle? I wonder if that will tell a more complete story.
As noted in the last log, the boost leak was found and corrected.
There are still several big hesitations as the engine pulls through the revs range. Maybe 6 separate hesitations or hiccups through a single pull.
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10/05/2022
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V2 run Boost leak found and corrected. HPFP replaced, but no change to rail pressure.
Fuel measured 9% Ethanol.
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10/02/2022
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Rerun v1 tune - E14 No CEL or limp mode. Previous to run, refueled at 1/2 tank, bringing mixture down to E14. Pulled charge pipe, cleaned, and reinstalled.
Run felt a bit stronger this time, but there are many stutters as it pulls through the revs. Not pulling "cleanly".
If resetting the charge pipe had a positive effect, is it worth changing the o-ring? I lubricated it, but it slipped on easily.
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09/17/2022
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93 octane v1 Actual fuel mix measured at E18. 3 distinct cross-lane bumps during the pull may show up as rpm jumps.
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09/15/2022
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