[JOHN328]

Just installed jb4.
Man was there a difference. Car is much much more powerful than bms stage 1 I had for 1 year.
But engine stalled 3 times, rough idle quitw often, don't know why, can anyone help?
I've checked on n55 post about this, some say its down pipe, cracked charge pipe, broken waste gate.
My car was all good until installing today, i mean i cant broke everything at once can i?
If nothing can be fixes i am going to go back to oem asap.
Please help if u can.
Thankyou!

[minijet]

Originally Posted by JOHN328

Just installed jb4.
Man was there a difference. Car is much much more powerful than bms stage 1 I had for 1 year.
But engine stalled 3 times, rough idle quitw often, don't know why, can anyone help?
I've checked on n55 post about this, some say its down pipe, cracked charge pipe, broken waste gate.
My car was all good until installing today, i mean i cant broke everything at once can i?
If nothing can be fixes i am going to go back to oem asap.
Please help if u can.
Thankyou!

check the fault codes and go from there.
Also from my experience most of these piggy backs never run as smooth as flash upgrades.

[David328M-Sport]

Originally Posted by JOHN328

If nothing can be fixes i am going to go back to oem asap.Please help if u can. Thankyou!

Is your JB4 the one where you have to insert a few individual wires? It would be if I was to upgrade. Not a necessity for me as I'm more than happy with S1.

Could be the wires may be incorrectly installed perhaps????

Otherwise, why don't you go back to stage 1, if you can.
Hope you sort it out.

[Spikey]

mmmm I've wanted to jump on the JB4 band wagon too. But so far am just happy with the stage 1.

I'd be advising the same... unplug it, going back to stock to see if issues are still present. Do you know if there are any fault codes being thrown from the JB4?

[J1n]

My JB4 hasn't given me any issues previously. Drive it a bit more maybe it's the computer trying to remap ur drive style to new config

[JOHN328]

Originally Posted by J1n

My JB4 hasn't given me any issues previously. Drive it a bit more maybe it's the computer trying to remap ur drive style to new config

Well i hope this is the case. I will try couple weeks if not goes back to oem.
Makes me scared to drive now, dont wanna break anything.

[UB]

My stock 328 stalled and developed very rough idle when the fuel injector failed.... is the car giving you any drivetrain warnings?

[JOHN328]

Originally Posted by UB

My stock 328 stalled and developed very rough idle when the fuel injector failed.... is the car giving you any drivetrain warnings?

Nah. No warning

[**ghost**]

check your rear exhaust for a lot of soot after leaving it to idle for a bit (don't rev it)

if you see a lot of soot gather you have a failed fuel injector

[Stuart@BMRAutowerkes]

Sounds like symptoms of having the JB4 MAF sensor installed. Remember for the JB4 to not plug in the MAF sensor to the JB4 connection (purple wires).
There should only be two points plugged into in the engine bay.. MAP (Brown) and TMAP (Rainbow)

[JOHN328]

Originally Posted by Stuart@BMRAutowerkes

Sounds like symptoms of having the JB4 MAF sensor installed. Remember for the JB4 to not plug in the MAF sensor to the JB4 connection (purple wires).
There should only be two points plugged into in the engine bay.. MAP (Brown) and TMAP (Rainbow)

Turns out to be the extra purple wire, took that off the MAF and all fixe now.
Thanks for ur help but why the purple wire if not needed?
And since i had it installed for 2 wks and stalled 5 times does it cause any likely damage?

[Stuart@BMRAutowerkes]

Originally Posted by JOHN328

Turns out to be the extra purple wire, took that off the MAF and all fixe now.
Thanks for ur help but why the purple wire if not needed?
And since i had it installed for 2 wks and stalled 5 times does it cause any likely damage?

Purple wire is for stage 1 only... JB4 doesn't required MAF sensor to be altered.

It may affect your fuel trims slightly in the short term but the car will sort itself out and no long term damage.

[JOHN328]

Thankyou so much. Ur words has made me feel more relaxed now.

[Stuart@BMRAutowerkes]

Originally Posted by JOHN328

Thankyou so much. Ur words has made me feel more relaxed now.