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      05-09-2012, 10:00 PM   #1278
f1rst 1
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Drives: '18 x1 & '09 Cayman S
Join Date: Apr 2011
Location: Denver

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Quote:
Originally Posted by Gdubz View Post
Couldn't reproduce the misfire with the BMW Tech doing a ride-along, but the car stuttered slightly and he was saying it's likely the fuel pump not being able to provide sufficient fuel that the tune is demanding, and not a problem with the injectors...

He's installing the catless DP's for me today and I'll flash Stg2 tomorrow, see if I still throw codes.

Anyone know the specific values the maps change? From what (stock) to what (stage1). The tech said he might be able to better diagnose the issue if he knew what the actual values were. I could datalog for him, but what my car outputs isn't necessarily what the values SHOULD be, so he can't tell what's wrong.

Had the same issue with misfires. I swapped plugs around, and the misfire always followed the coilpack. Replaced a coilpack for 45 bucks from the dealer and the problem was solved. Haven't had an issue since, new or old maps.
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Current: 2018 MSport x1 & 2009 Cayman S
Former:

2013 BMW 335i XDrive M Sport 6spd
Cobb Tuned '09 135i
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