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06-28-2018, 09:46 AM | #1 |
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I've been having some sporadic issues with boost for some time and finally was able to capture it in a log with the JB4. Symptom is when you're on the gas at a steady state somewhere between 40%-95% throttle, the boost seems to tank and the power dumps down. Full throttle is fine, less throttle is also fine.
This log has me really scratching my head because it shows a massive dip in pedal input, even though I was 100% steady with it depressed around 60% pulling away from a light. Everything else seems all over the place as well. Anyone have any thoughts on this?? I've also attached the excel doc if anyone wants to dig in further. ![]()
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"Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq |
06-29-2018, 03:32 PM | #2 |
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what do the n54 tech lads have to say?
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135i - E82.N54 2009 BSM - MHD / xHP / DCI, PR CP & 7.5" Race IC / N55 mid & Borla . . WL RSFI, Koni, Eibach & Dinan CP's, M3 CA's / EBC Red's & Firehawk 500's X1 - E84.N20 2013 MGM - JB4 - The Wife's, now with new turbo & ewg |
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07-01-2018, 01:36 PM | #3 |
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Haven't posted there yet didn't have much info, got some more details now though so about to go there
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"Tobias" 2013 135i ///M-Sport 6MT • Pure Stage 1 • XDI 35 HPFP • 404whp/440wtq |
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boost, drop, issue, jb4, leak, log, n55, pedal, problem, throttle |
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