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      02-01-2013, 11:24 AM   #1
First Lieutenant

Drives: LP550-2 & F10 550i
Join Date: Dec 2006
Location: Hockessin, DE

iTrader: (4)

Cold Start Issues after Jb4 Install

I just installed a second hand JB4 G4 Board onto my E92 2009 335i. On very cold starts it struggles to start, the RPMs idle from 1200-600. But the major problem is occasionally once I get driving (after a short warm up period) the turbos don't seem to be working - feels like a 170hp car if that... Once I turn the car off after the fact and then turn it back on, it comes back to normal.

Any ideas on what it could be?

I updated the firmware (the problem still exists)
I even was running Map 0 then Map 1 (still happens).


Weekend: Ferrari F430 Spider- F1 - Matte White
DD: 2011 550i Xdrive M-Sport
Gone: 2008 Aston Martin V8V, Stratus White, Bitter Chocolate, 6psd, Modded ~ 450hp, 2009 E92 335i M-Sport, 2003.5 E46 M3