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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > JB4 need help!!



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      02-03-2017, 04:25 PM   #1
e92wolfe
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JB4 need help!!

I just went to the dealer to replace my battery the other day. Everything was working fine before I took my car in. Got my car back and now I'm not hitting full boost in map 5. I hit around 11-12psi and I'm running e85. Before I was hitting 15-17psi. What is going on? No codes either.
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      02-03-2017, 07:21 PM   #2
weehe126
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Well im guessing you put it in map 0 so they could code the battery. Need to do your 3 calibration pulls in map 5 again.
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      02-04-2017, 04:22 AM   #3
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Quote:
Originally Posted by weehe126 View Post
Well im guessing you put it in map 0 so they could code the battery. Need to do your 3 calibration pulls in map 5 again.
Unfortunately I forgot to put it in map 0
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      02-04-2017, 05:04 AM   #4
prima_materia
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Call me a newb, but if the dealership replaced the battery, disconnecting the old one and taking it out and putting a new one in, that could've potentially kicked you out of map 5 or done something funky map/adaptation-wise?

Either way, I'd get on a straight stretch of road and get a couple 3rd gear adaption pulls to help hone things in. Even after that, drive it for a couple more days to help the map 5 learning process, just to see if it learns up beyond the 11psi or so you were hitting.

Also, if you could provide a log that would be sweet.
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      02-06-2017, 06:25 PM   #5
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+1 for logs and wait a day for map 5 and get some runs at WOT.
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