E46Fanatics - View Single Post - HPF stage 2 meth problem
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Old 07-27-2013, 01:39 PM   #7
Evil Twin Rob
Registered User
Join Date: Aug 2007
Location: Spokane Wa.
Posts: 1,085
My Ride: 2004 M3
Originally Posted by bluba View Post
Wouldn't the boost drop back if I had a leak? I also pressurized the lines and I didn't see any visible leaks
The meth system has a pressure sensor, so it will drop the boost if the pressure is too low. You would see a leak big enough to drop the pressure, so perhaps the sensor is failing? Also, if you ran out of meth at some point, you need to disconnect the hose and purge any air out of the system. You probably already know that, but just suggesting things to double check.

Originally Posted by being3 View Post
Sounds like knock and the Aem is pulling timing to compensate... Do u have ur Aem unlocked ? Best way to know is pull the logs... If u need it unlocked ask John Reed for help. johnreedracing@gmail.com ... U dont want to mess with this if meth is not working properly u could do some damage
The knock alarm is pretty sensitive, and I think it will start chirping before timing would be pulled.

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HPF 2.5
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