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ehoons ehoons is offline
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Car: E60 535xi
Default Boost dropped from 17psi to 15psi - 03-13-2019, 12:01 PM

Can someone take a look at this log?

I have been targeting around 17 psi all week, all of a sudden I can't make over 15 psi. No change in fuel or tune, no check engine lights, and it pulls smooth, just builds boost slower than usual.

Mods:
JB4/MHD BEF
Charge Pipe W/ Modded DVs
DCIs
OCC
5 gallons of e85, the rest 91 octane
Running On Map 5

In the past I've replaced all my vacuum lines except for the ones from the boost solenoid to the waste gate. That is where I am going to start. I just want to confirm there is nothing else obviously wrong. Any input is appreciated.
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File Type: csv JB4 Log.csv (11.5 KB, 37 views)
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Car: E92 335XI
Default 03-13-2019, 01:20 PM

Quote:
Originally Posted by ehoons
Can someone take a look at this log?

I have been targeting around 17 psi all week, all of a sudden I can't make over 15 psi. No change in fuel or tune, no check engine lights, and it pulls smooth, just builds boost slower than usual.

Mods:
JB4/MHD BEF
Charge Pipe W/ Modded DVs
DCIs
OCC
5 gallons of e85, the rest 91 octane
Running On Map 5

In the past I've replaced all my vacuum lines except for the ones from the boost solenoid to the waste gate. That is where I am going to start. I just want to confirm there is nothing else obviously wrong. Any input is appreciated.
I donít see anything glaring in the log. Tbh map 5 can be a bit finecky at times, your at or around 16.x psi for some of the pull, so I donít think you have a hardware issue.

If your so inclined- you can run map 7, see if you have the octane for it, or if you want 17 psi, map 6 is always an option too that we can help dial in.


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