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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > 335 Injector Issue-JB4 Off Vs. On

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      01-06-2012, 01:12 PM   #1

Drives: 2007 E90 335Xi
Join Date: Feb 2010
Location: NJ

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335 Injector Issue-JB4 Off Vs. On

Hey guys,
I seem to be having trouble with an injector (not sure which one it is yet, haven't scanned for it). Basically, when my JB4 tune is on, if I try to accelerate hard itll throw a SES light and i can feel the car misfiring (I had a bad injector last month so I know what it drove like). However, after driving for a minute or two the light goes back off and everything works normal. If I turn the chip off, I can't get replicate the problem again. What should I do? I could obviously bring it in for service after it throws the SES light because I know the code will store, but problem is I need to clear out the hidden tuner codes that get thrown with it so when I go to clear the codes it clears all the codes. Any thoughts or suggestions?
-335xi---Innotech Exhaust---AR 3" Catless---Pro tuned---HPF FMIC---ER Chargepipe---KW V1---Injen DCI---BMW Performance Front Bumper, Rear Spoiler & Door Sills---Vorsteiner wheels---much more-
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      01-06-2012, 03:25 PM   #2
mid-corner fun

Drives: M3
Join Date: Jun 2005
Location: NE

iTrader: (5)

Originally Posted by iloseguitarpicks View Post
What should I do?
The same thing your dealership or indy shop would do. Read the fault codes to determine next steps.
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