Thread: JB4 Issue
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      09-17-2012, 10:00 PM   #1
alexx03
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Drives: 2007 BMW 335I
Join Date: Jun 2012
Location: Vaughan

iTrader: (2)

JB4 Issue

Seem to be having issue with my jb4 system.
Not getting any codes and i have checked all the connectors twice already and they are all fully connected.
Sometimes when I start the car and I go for a spirited drive the car will not boost fully. I am on map 2 and it will barley hit 10psi and you really feel the difference.sometimes switching to map 1 and back to map 2 fixes it,sometimes I have to go to map 0(power off the jb4) and then back to map 2 and the issue is fixed. Sometimes neither of those tricks work and I need to turn the car off and turn it back on. Basically I just play around until it goes back to normal.
Let me know what you think
Thanks guys
Appreciate 0