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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Still need help.. engine misfire. UPDATE FIXED



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      02-03-2015, 10:25 AM   #1
335iNavyGuy
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Still need help.. engine misfire. UPDATE FIXED

****UPDATE*** 02/03/2015
OK SO after installing a new OEM spark plug, new OEM coil pack and a low press fuel sensor.. she is running!!!

NOW im getting Vanos codes, so ill just replace those and be done.




****UPDATE****
Ok so here is everything I've tried.

Replaced spark plugs
replaced coil packs
Replaced number 3 fuel injector and coded it
cleaned all intake valves
cleaned vanos solenoids"did not replace"


Continuous misfire, on cylinder 3. Code will no longer say what cylinder is misfiring though but it's constant. And I cannot drive the car atm.

Spark plug in cylinder 3 is darker than it should be for being new, and had oil on it, not a lot but some.

Also had gas on it.

Goin to check wires tonight, if you have any ideas please give me then.

Really sick of this issue !!

Codes:
2AAF - fuel pump plausibility
29f3 - Faulty fuel low pressure sensor
2A7C - no description found
29Ed - fuel mixture control
2a2b - fuel mixture control 2
29ed - fuel mixture control
29e1 - fuel mixture control 2
29cf misfiring cylinder 3
0000 - unknown
0000 - unknown.

Also Lambda codes because I pulled out my 02 sensors
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      02-03-2015, 10:33 AM   #2
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With all those fuel mixture control issues and fuel pump stuff it's probably the low pressure sensor, a common failure point that poses a lot of problems. I would also inspect your valve cover to ensure it's not cracked and possibly replace your valve cover gasket.
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      02-03-2015, 10:38 AM   #3
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As Jeff stated, I would check the low pressure fuel sensor. Cheap fix and not hard to replace.
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      02-03-2015, 12:00 PM   #4
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I almost want to smack you.
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      02-03-2015, 08:11 PM   #5
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Quote:
Originally Posted by JStang View Post
As Jeff stated, I would check the low pressure fuel sensor. Cheap fix and not hard to replace.
Cheap fix? Im in the "Navy" Two sensors that cost 160$ each is not a "cheap fix"
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      02-03-2015, 08:16 PM   #6
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Quote:
Originally Posted by Jeff@TopGearSolutions View Post
With all those fuel mixture control issues and fuel pump stuff it's probably the low pressure sensor, a common failure point that poses a lot of problems. I would also inspect your valve cover to ensure it's not cracked and possibly replace your valve cover gasket.
Only place that can even get it is the dealership and they are 160$ a piece ugh..
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      02-03-2015, 08:54 PM   #7
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Quote:
Originally Posted by 335iNavyGuy View Post
Only place that can even get it is the dealership and they are 160$ a piece ugh..
Have you checked ECS, or other sources online?
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      02-03-2015, 08:54 PM   #8
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Quote:
Originally Posted by 335iNavyGuy View Post
Only place that can even get it is the dealership and they are 160$ a piece ugh..
ECS sells it for around $85 and Pelican for around $118. That's relatively cheap compared to changing out the other parts mentioned by Jeff.
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      02-03-2015, 08:55 PM   #9
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Quote:
Originally Posted by 335iNavyGuy
Quote:
Originally Posted by Jeff@TopGearSolutions View Post
With all those fuel mixture control issues and fuel pump stuff it's probably the low pressure sensor, a common failure point that poses a lot of problems. I would also inspect your valve cover to ensure it's not cracked and possibly replace your valve cover gasket.
Only place that can even get it is the dealership and they are 160$ a piece ugh..
It's just one low pressure file sensor, ecs should have it for around $100.
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      02-03-2015, 09:42 PM   #10
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Sorry to hear. Did you get rid of the jb4 and try?
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      02-03-2015, 09:53 PM   #11
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Quote:
Originally Posted by 335iNavyGuy View Post
Cheap fix? Im in the "Navy" Two sensors that cost 160$ each is not a "cheap fix"
It's only one sensor and it's about $80.00.
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      02-03-2015, 10:17 PM   #12
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I'm a DIY guy but there are times where it's best to throw in the towel and let BMW at least figure out what's wrong with it and if anything replace that part yourself.
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      02-04-2015, 12:27 AM   #13
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Quote:
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I'm a DIY guy but there are times where it's best to throw in the towel and let BMW at least figure out what's wrong with it and if anything replace that part yourself.
fixed!
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      02-04-2015, 10:00 AM   #14
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What was it

Edit, nvm just saw. Also you should be able to just clean the vanos solenoids, most people havn't had any problems with that method, it would probably save you around $200.

Last edited by 07chupacabra; 02-04-2015 at 10:29 AM.
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      02-04-2015, 02:57 PM   #15
335iNavyGuy
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Quote:
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What was it

Edit, nvm just saw. Also you should be able to just clean the vanos solenoids, most people havn't had any problems with that method, it would probably save you around $200.
Thats the thing, i did clean them. They didnt even give any errors until AFTER i cleaned them. I will try one more time.
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