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cjnnewman cjnnewman is offline
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Join Date: Jan 2018
Car: 2009 BMW 335i RWD 6AT
Default LPFP Dips Below 50 PSI - 01-24-2018, 10:58 PM

HELP! I can not for the life of me get a straight answer or at least, a solid suggestion for what to try. I will attach two logs, one showing a WOT run with some dips but staying above 50. And another with a the dips I see regularly, down below 50. These ALWAYS occur as I first push down the throttle, then it jumps up and slowly creeps back down towards 50. My rail pressure has never gone below 1500psi, typically staying above 1800.

Am I looking at a problem? Some have said that because HPFP psi is fine that it could just be a sensor?

I am running non-ethanol 91 Octane with the MHD Stage 1+ 91 tune.

Steady, but low: https://***********/u/cjnnewman/log-...&mark=51-38-29

Low with sub-50 dips: https://***********/u/cjnnewman/log-...-13&mark=29-22
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