|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Jb4 small boost leak
|
|
01-09-2015, 11:02 AM | #1 |
Private First Class
32
Rep 103
Posts |
Jb4 small boost leak
Installed JB4 and for some reason I'm not hitting the usual 15-17 psi. I'm hitting max 10 psi so there's gotta be a leak somewhere. Tried both map 1 and 5 (only mods are jb4 and PE). I'm not an expert on the n55 so does anyone have suggestions on where to start looking for this boost leak? Thanks in advance
__________________
BSM/Coral Red '12 E92 335i xDrive
|
01-09-2015, 11:05 AM | #2 |
Lieutenant Colonel
247
Rep 1,595
Posts
Drives: 2011 335i xDrive Msport
Join Date: Apr 2013
Location: Orlando
|
Are you sure the JB4 is hooked up correctly? That sounds like stock boost levels. Are the steering wheel controls working?
|
Appreciate
0
|
01-09-2015, 12:44 PM | #3 |
Major
132
Rep 1,086
Posts
Drives: '11 335i M-Sport [LeMans Blue]
Join Date: May 2011
Location: York, PA
|
Check charge pipe and intercooler couplers.
__________________
'11 335i M-Sport xDrive Coupe [LMB] COBB V3 & PTF Tune | E45 |4in BERK DP | VRSF 5in FMIC | BMS Intake | ER CP | Exotics Tuning CF Lip | CF Diffuser | Eibach Springs | Bilstein Shocks '07 BMW 335i Coupe & BMW Z4 3.0i - Gone |
Appreciate
0
|
01-09-2015, 01:28 PM | #4 |
Brigadier General
1188
Rep 3,221
Posts |
What gas are you using? If all you have is the tune, as the exhaust does nothing, you should only run map 1 which is 12psi. Stock is 8psi. Unless you have E40 there is no way you will hit 16+psi. Also, map 5 takes 3 third gear pulls to auto tune. It will only do 10psi untill you do the pulls.
|
Appreciate
0
|
01-10-2015, 08:19 AM | #6 |
Private First Class
109
Rep 178
Posts |
You also need to make sure that your oil temp is warmed up. I dont remember the exact temperature but I recall reading somewhere that the JB4 will have stock psi until your car is warmed up.
__________________
|F90 M5 | F80 M3| Lambo |
Last edited by AJF80; 01-10-2015 at 10:01 AM.. |
Appreciate
0
|
01-10-2015, 10:17 AM | #7 |
Brigadier General
1188
Rep 3,221
Posts |
|
Appreciate
0
|
Bookmarks |
|
|