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Fuel oscillation while tuning

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Old Feb 27, 2025 | 08:42 PM
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From: Boston, MA
Default Fuel oscillation while tuning

Hey guys.

I got my turbo setup half installed, currently waiting on charge piping and intercooler. While tuning the idle and trying to get my VE table back in line with autotune, I have very bad fuel oscillation while under higher loads. The engine runs rough. I expect it is a misfire but wanted to know our opinions on the matter.

My car is running basically straight off the TB with a filter on it. . I resized the injectors in the tune as the stock NB injectors are 265cc @ 3 bar, what I had it set initially to. The NBs fuel pressure is 4 bar though, as such I rescaled the injectors to 306cc in the tune. Should I have done that? It seems to idle but runs very poorly. In addition, My timing offset, 2 degrees before I installed the setup, is now 25 degrees. Should that be considered normal? The timing marks match the marks on the lower timing cover

msq and mlg files attached
Attached Files
File Type: mlg
2025-02-27_20.13.21.mlg (210.4 KB, 23 views)
File Type: msq
2025-02-27_20.24.03.msq (98.9 KB, 21 views)
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