JB 4 remove and limp mode

[mkot9]

As soon as I take my JB4 out the car goes into limp mode. How do I fix this problem?
Thanks guys

 

[David1]

Do you have other mods? Downpipes?


Sent from my iPhone using Tapatalk

 

[mkot9]

Nothing, just the JB4

 

[Magneto]

Leave it in.

 

[mkot9]

Hahaha thanks, but it has to go to the dealership

 

[Magneto]

Then take it out and send it in and tell them car losing power.

 

[Kish2604]

Who installed it for you?

Is the power wire put back in correctly? Are the sub connectors in the correct location in the plug?

---

Ps. What engine is this?

 

[mkot9]

Which power wire? And did it at Project shift, and all the wires are in the right place yes

 

[Magneto]

Who installed it for you?

Is the power wire put back in correctly? Are the sub connectors in the correct location in the plug?

---

Ps. What engine is this?

---

This is a better and more informed answer than mine.

 

[mkot9]

An N55 stage 2 JB4, with no other tunes

 

[Dean ///M]

Check the TMap connector & pins. Or else disconnect battery for 30mins.

 

[mkot9]

I just put the JB4 back in and the car is fine, but as soon as I remove it, it goes back into limp mode

 

[Kish2604]

Ok n55 is slightly different, have you looked at the install guide? Here is the link...

N55 install

Also I hope you removed the power on the battery before working on the car, sounds like you fried a sensor or didn't connect one of the plugs in correctly...

 

[mkot9]

So lets assume I fried a sensor. What would I say to BMW?

 

[Twinz]

It wants to stay :=):

 

[mkot9]

And I cant find my usb, so cant read any errors?

 

[Twinz]

1. Disconnect battery
2. Start disconnecting Jb4 on the solenoid side. Disconnect the jb4 solenoid and remember to plug (both) stock connectors in.
3. Then do Maff..then Map...then Tmap. Remember to plug in both stock connectors after unplugging Jb.
4. Then do the power wire...earth wire then the CAN wires.
That should solve it

 

[Twinz]

If you really cant work it out then you can call me or Burgy but not later than 9pm...Flu got me this winter.

 

[mkot9]

I will try it in the morning and see if I could solve the problem. Can BMW pick up anything if something should have gone wrong?

 

[Gizmo]

Does BMW not see on the telemetry that the car has been boosting higher than stock?