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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > The N51 Struggle :(



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      07-17-2018, 05:17 PM   #1
R.Thillman
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The N51 Struggle :(

I had installed aa headers a couple months go onto my n51 with 3SIM with no tune. it ran really good and would purr at around 6k. For about four months it ran perfect and now i have been getting multiple codes and don't know where to start. I have 5 codes that usually are there because of the headers that are lambda/cat/SAP such as 2c3d, 2ca6, 29f5, 29f4, 2a00

The ones im worried about is 2a99/2A98/ 2a87/2a43 crankshaft correlation they all appeared at different times after clearing them i was trying to see if i needed a cam sensor or solenoids; 2a16 DMTL fine leak. I had those for about 2 weeks and it would give me a slight stumble momentary after start up and run fine after and then just yesterday i got these codes 2ad8 EAC sensor, 2aab variable disa.

Still runs good after the stumble on start up but now its time to wrench. I have cleaned the solenoids prior already but didn't swap them. Guessing i need a couple solenoids maybe some sensors and a disa valve forsure. Going to try and test the vanos on INPA tomorrow. where would you guys start thanks in advance?
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      07-17-2018, 06:02 PM   #2
Eagle1oh7
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Did you get a tune?
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      07-17-2018, 09:03 PM   #3
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Quote:
Originally Posted by Eagle1oh7 View Post
Did you get a tune?
no not yet, i need to maintenance her first although it could solve problems
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      07-17-2018, 10:49 PM   #4
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Quote:
Originally Posted by R.Thillman View Post
no not yet, i need to maintenance her first although it could solve problems
You will continue to get codes for your cats until you get a tune. That's the only reason why you're getting these codes and a CEL.
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      07-17-2018, 11:47 PM   #5
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You will continue to get codes for your cats until you get a tune. That's the only reason why you're getting these codes and a CEL.
Thanks but I know that I'm not worried about those. I said above I'm just worried about the vanos/ cam sensor codes causing a stumble momentary after start up and disa.
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      07-18-2018, 05:36 AM   #6
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Clean the sensor or replace
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      07-21-2018, 12:09 PM   #7
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Did you email me for help? Because your email address was wrong so I couldn't respond.
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      07-23-2018, 03:03 PM   #8
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Did you email me for help? Because your email address was wrong so I couldn't respond.
Hey yes i did sorry you can email me here Ryanthillman97@gmail.com thanks in advance! Going to add a project on bimmer labs today as well.
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