[Bakrueger]

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So I've recently decided to go with the BMS meth kit with stealth tank, all is installed and connections double checked. When the car is powered on the pump runs non-stop but purges just fine, and seems to run fine in map 3.

My understanding is that this pump should only be running when spraying meth, not all the time. Would this be the sign of a faulty FSB? I've heard bad ground connections can cause all sorts of issues but everything is grounded at a factory location and are solid connections. I'm at a loss! In the meantime I've wired in a simple toggle switch to only turn the pump on for testing until I have this sorted out.

Side note; I didnt see the FSB for sale individually on the BMS site? If I could find one cheap enough I would try it out just to be sure.

[tbrazil]

Just curious... I was thinking of purchasing the meth kit myself, but I was curious if the performance gains worth it/noticeable

[Bakrueger]

Originally Posted by tbrazil

Just curious... I was thinking of purchasing the meth kit myself, but I was curious if the performance gains worth it/noticeable

I feel like it pulls smoother and a little harder at higher RPMs but haven't ran it incredibly hard yet because I want to be sure I have everything connected properly. Hoping a response confirming this setup is connected fine so I can run it hard and not worry!

[bmwchue]

your pump should not be on at all times
it should only come on when you WOT
if you could list me all the wires you connect to i can help you out
ill also need to know if your jb4 is ewg or pwg and what year your car is

i just recently did mine

[Bakrueger]

Originally Posted by bmwchue

your pump should not be on at all times
it should only come on when you WOT
if you could list me all the wires you connect to i can help you out
ill also need to know if your jb4 is ewg or pwg and what year your car is

i just recently did mine

Vehicle is a 13 328i N20 with EWG. Everything is connected per the installation guide including blue wire from FSB to pin #14, and factory ground locations used.

[take1step]

Try to update the firmware of the JB4. The same happened to me. Before update : I had flow reading 30% all the time and 100% at WOT. After I updated, it was reading 0% flow until WOT. You can update on n54tech/4banger website

[Bakrueger]

Originally Posted by take1step

Try to update the firmware of the JB4. The same happened to me. Before update : I had flow reading 30% all the time and 100% at WOT. After I updated, it was reading 0% flow until WOT. You can update on n54tech/4banger website

I'll have to give this a try later since it's so simple. I thought I updated to the latest version after receiving the unit but I could be wrong!

[bmwchue]

Originally Posted by Bakrueger

I'll have to give this a try later since it's so simple. I thought I updated to the latest version after receiving the unit but I could be wrong!

so what happened