Does anyone know how to log the pressure sensed (or other parameter) by the second MAP sensor mounted on the intake manifold? Been trying to find a boost leak. Replaced vacuum lines, intercooler o rings, pre throttle body MAP sensor o ring, charge pipe, DVs tested, rear turbo boost solenoid, still cant find the problem. Could be turbos but started after OFHG replacement so I am hoping if I have cracked the intake manifold or pinched manifold gaskets, I should be able to see a pressure drop or behaviour between pre throttle body sensor and intake manifold sensor that indicates a problem. WGDC PID gives up after first pull.
N54 second/manifold MAP sensor address MHD
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Thank you @carabuser. At this point I have checked or replaced all the common stuff like vacuum lines, boost solenoids, tested the DVs, charge pipe, intercooler connections. Don’t know what else to try so yes please could you give me the logging parameter? I have a UK 2007 335i with MSD80 I believe so it would be I8A0S.
Unzip that file and place the xml into the MHD root folder and you should then see Manifold Pressure as a loggable parameter.
It's absolute pressure, so deduct the atmospheric reading to get gauge. It should trace the boost pressure until 3psi. After that it'll just cap out.
It's absolute pressure, so deduct the atmospheric reading to get gauge. It should trace the boost pressure until 3psi. After that it'll just cap out.
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