JB4 issue no boost

musseilm · 04-09-2013, 09:37 AM

Hi guys,

Stock E92 335i n54, with jb4 G4

Running map5 for the last 125miles. This morning it run all fine, get of the highway try to drive away at the light and have only about 7psi of boost...
No checkengine light, no funny noise. I went to map0 for stock and back to map1 and 5, same results.

I try again when i leave work today.

m_fife · 04-09-2013, 09:51 AM

Blown off charge pipe or boost solenoid perhaps...

musseilm · 04-09-2013, 03:49 PM

Map1 runs fine.. 12-13psi.
After a few pulls on Map5 in 3th-4th gear and limits the boost to around 5psi.

After i restart the car is works normal again.

Mike@N54Tuning.com · 04-09-2013, 03:52 PM

Quote:

Originally Posted by musseilm

Map1 runs fine.. 12-13psi.
After a few pulls on Map5 in 3th-4th gear and limits the boost to around 5psi.

After i restart the car is works normal again.

If its a G4 board it might just be a simple tuner code. Or a JB4 safety system. Do a CSV log and send it in to BMS for advice.

Mike

musseilm · 04-09-2013, 03:59 PM

Yeah its a G4

04-09-2013, 09:37 AM	#1
musseilm Second Lieutenant 37 Rep 254 Posts Drives: F82 Mineral Gray Join Date: Aug 2010 Location: West Palm Beach, FL iTrader: (3)	JB4 issue no boost Hi guys, Stock E92 335i n54, with jb4 G4 Running map5 for the last 125miles. This morning it run all fine, get of the highway try to drive away at the light and have only about 7psi of boost... No checkengine light, no funny noise. I went to map0 for stock and back to map1 and 5, same results. I try again when i leave work today. Last edited by musseilm; 04-09-2013 at 03:59 PM.. Reason: Correction G4
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04-09-2013, 09:51 AM	#2
m_fife First Lieutenant 129 Rep 339 Posts Drives: 2018 M5 Join Date: Jan 2013 Location: USA iTrader: (0)	Blown off charge pipe or boost solenoid perhaps...
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04-09-2013, 03:49 PM	#3
musseilm Second Lieutenant 37 Rep 254 Posts Drives: F82 Mineral Gray Join Date: Aug 2010 Location: West Palm Beach, FL iTrader: (3)	Map1 runs fine.. 12-13psi. After a few pulls on Map5 in 3th-4th gear and limits the boost to around 5psi. After i restart the car is works normal again.
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04-09-2013, 03:59 PM	#5
musseilm Second Lieutenant 37 Rep 254 Posts Drives: F82 Mineral Gray Join Date: Aug 2010 Location: West Palm Beach, FL iTrader: (3)	Yeah its a G4
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