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      10-11-2014, 12:03 PM   #1
joelcn91
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HELP… Cant figure it out

I installed a JB4 a few days ago on my 08 135i auto an all was fine until yesterday. It Started throwing codes, jumping from map5 to map4. They somehow cleared themselves an the car runs fine again. Then today the service light came on an the car would shake like hell if I pushed the gas. After about 2 min of this the light went off an the car runs fine again??????????????


Any insight would be GREATLY appreciated.
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      10-11-2014, 12:38 PM   #2
joelcn91
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The first codes: Cant find anything on them

30

2A17

30F

2FC7
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      10-11-2014, 12:47 PM   #3
ayao
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You may have inadvertently ended up in the 1M forum -- you might garner more responses over in the 135i section ...
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      10-11-2014, 01:13 PM   #4
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Quote:
Originally Posted by joelcn91 View Post
The first codes: Cant find anything on them

30

2A17

30F

2FC7
2a17: DMTL pump failure = fuel vapor pump. Typically does not impact performance, but can throw a CEL.

30FF: boost leak = could be a number of issues... Charge pipe, diverter valves, intercooler connections, ect. This would be my first guess considering your symptoms. Has the exhaust note become deeper?

2fc7: mystery code? Lots of questions about this one on the web, but can't seem to find an answer.

http://procedetuning.com/BMW/n54/dow...des%208-17.xls
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      10-11-2014, 03:09 PM   #5
joelcn91
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Thank you for your help. Yea I can't find anything on 2fc7.
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      10-11-2014, 03:10 PM   #6
joelcn91
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When I use the hijacker on the oil gauge I am hitting 16lbs.
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      10-11-2014, 09:17 PM   #7
joelcn91
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Now it is missing. When I go WOT the service light will come on an it will have a miss. When I turn the car off an on again the miss is gone. ???
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      10-13-2014, 01:09 PM   #8
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Do a few pulls and post the logs.
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      10-14-2014, 05:30 PM   #9
joelcn91
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Im about to get the JB4 Mobil app. I will post some logs shortly. Thanks for your help. The exhaust has deepend quite a bit?
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      10-22-2014, 07:09 PM   #10
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Welcome to the wonderful world of piggy backs. Double check your install or pull it off, clear does and go for a test drive. Check for codes again.
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      10-27-2014, 09:17 PM   #11
joelcn91
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It ended up being a tiny crack in the charge pipe, an bad plugs… I changed both an the problem is gone. Now I get misfires on cold start that go away when the car warms up??? o2 sensor maybe? Happened after changing the downpipes to catless...
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      11-03-2014, 12:20 PM   #12
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Quote:
Originally Posted by joelcn91 View Post
It ended up being a tiny crack in the charge pipe, an bad plugs… I changed both an the problem is gone. Now I get misfires on cold start that go away when the car warms up??? o2 sensor maybe? Happened after changing the downpipes to catless...
Check your plugs. Any codes?
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