[Mpriftiz4]

Recently decided to do a MHD backend flash to my N54tuning z4 running JB4. I inadvertently flashed the regular tune by following instructions in beginning of manual rather than the specific JB4 backend flash. Car wouldn’t turnover so I reflashed it back to zero and same issue. What now???? Please help thank you.

[type-dRew]

Try flashing to a jb4 map like you meant to the first time?

Its also my understanding the jb4 has to be completely uninstalled to flash correctly, was it?

[Mpriftiz4]

Originally Posted by type-dRew

Try flashing to a jb4 map like you meant to the first time?

Its also my understanding the jb4 has to be completely uninstalled to flash correctly, was it?

No, that was a problem. I hope I didn't ruin the JB4. I left the charger on overnight and started this morning, but it was revving up and down since it's still on a JB4 map. I changed the map to zero and it started fine, back to stock settings. I will try to reflash MHD tonight while keeping JB4 on map zero this time. Fingers crossed.

[Mpriftiz4]

Can someone explain to me exactly what step 12 is referring to by stating select 4/2 to enable backend flash capability??

[sbsk518]

Originally Posted by Mpriftiz4

Can someone explain to me exactly what step 12 is referring to by stating select 4/2 to enable backend flash capability??

*Enter JB4 menu
*Set speedometer to 4 (40) then set tach to 2 (2000)
*Exit JB4 menu
*Follow instructions for MHD BEF