[pieromar]

I have a 08 335i with jb4 and downpipes ...The problem I'm having is that the car won't go over 8psi on any map on the jb4.
I checked almost everything and can't figure out the problem.


Here is a video I made of the boost solenoid and vaccum leak



Watch "Jb4 335i check" on YouTube
Jb4 335i check:

[mike@x-ph.com]

Make sure JB4 is upgraded to the newest firmware, then make sure everything is installed correctly.
Check for boost leaks, if none is found take it to the mechanic and ask them to check for boost leaks.

[Miko226]

Do you give your car time for oil temps to go over 160 degrees F? If not your car maintains stock boost until oil temps are >160 Degrees F with the JB4

[pieromar]

Yes I let the car warm up and I just bought the jb4 1 week ago..do I really have to update it already?

[Jeff@TopGearSolutions]

Nobody watched the video? :SMH:

You will not hit peak boost while parked, you need to drive the vehicle.

Boost is a measurement of restriction in the intake manifold. Without a load on the vehicle boost pressures are irrelevant.

[FL335]

Originally Posted by Jeff@TopGearSolutions

Nobody watched the video? :SMH:

You will not hit peak boost while parked, you need to drive the vehicle.

Boost is a measurement of restriction in the intake manifold. Without a load on the vehicle boost pressures are irrelevant.

LOL…that was the first thing I saw…drive it!

[pieromar]

Guys I posted that video for you guys to see my vaccum if you guys think is fine...If I drive it my boost won't go over 8psi.

[pieromar]

fixed

[Jeff@TopGearSolutions]

Originally Posted by FL335

LOL…that was the first thing I saw…drive it!

After owning a website for several years alone, I can assure, NOBODY reads or pays attention to details.

I'm about to start putting subliminal messages into descriptions and see if people notice i tell them they smell bad or something. (something not overly offensive)

Originally Posted by pieromar

fixed

How did you fix it?

Others who run into same problem would want to know.