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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > JB4 HELP!



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      12-08-2012, 10:42 PM   #1
SGJB135i
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JB4 HELP!

Hey guys, I had my jb4 installed today and i noticed when i drive i hear a loud noise. I opened my hood and it was my fan. It doesnt stop till i turn off the car. I turned it off from my steering wheel but still doesnt do anything. Anyone experience this problem? Thanks in advance!
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      12-08-2012, 10:47 PM   #2
E90Company
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Did you buy your JB4 used? MaxCool mode may be on
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      12-08-2012, 11:21 PM   #3
SGJB135i
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Did you buy your JB4 used? MaxCool mode may be on
yes i bought it used but i turned it off and it doesnt stop!
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      12-08-2012, 11:21 PM   #4
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Max cool is probably on. You can disable it by going to Speedo 6 Tach 2 in the JB4 Menu. Hope this helps.
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      12-08-2012, 11:33 PM   #5
SGJB135i
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Max cool is probably on. You can disable it by going to Speedo 6 Tach 2 in the JB4 Menu. Hope this helps.
i tried it but still doesnt work!

do you know if its bad to drive with on the whole time?
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      12-09-2012, 12:04 AM   #6
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It's just a fan, the only side effect could be your car doesn't warm up as fast. That and your fan bearing might go out faster.
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      12-09-2012, 12:27 AM   #7
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Definitely want to figure this out.
Driving around with that loud fan is stupid.
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      12-09-2012, 12:59 AM   #8
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or your water pump went.
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      12-09-2012, 01:01 AM   #9
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did you install that bad unit you sold me????
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