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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 04-27-2014, 10:03 PM
sannouni sannouni is offline
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335D loss of power after changing glow plugs

Hi everyone,

I was working on my friends car over the weekend (replacing the Glow plugs on his 2009 335D Automatic), everything went smooth, torqued all the intake manifold bolts and nuts to spec (with new gasket set), changed the glow plugs and their controller (which is also in the vicinity)

after the work was complete, started the engine, it idled smooth. while test driving the car, we noticed that there was a clear loss of acceleration (it's as if the engine is bogging down, or is choking) until RPM reaches around 2500, then the power comes at a big surge (as if nothing is wrong).

we reopened everything to make sure that the work was done correctly, and it was... we put the car back together. the problem is continuing...

the engine codes are
P0299: Turbo Under-boost Condition
P2457: Exhaust Gas Recirculation (EGR) Cooling System Performance

any help and or ideas would be greatly appreciated.... thanks
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  #2  
Old 04-28-2014, 01:57 AM
ctuna ctuna is offline
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You might do a search at the following link

http://www.e90post.com/forums/forumdisplay.php?f=377
Don't see much diesel discussion here accept for how great the
mpg's are.
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  #3  
Old 04-28-2014, 08:20 AM
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David1 David1 is offline
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Why in the world would you change glow plugs. They should last the life of the car.
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  #4  
Old 04-28-2014, 08:23 AM
Nadir Point Nadir Point is offline
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Most likely something was disturbed or left disconnected during reassembly.
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  #5  
Old 04-28-2014, 08:27 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by sannouni View Post
the engine codes are
P0299: Turbo Under-boost Condition
P2457: Exhaust Gas Recirculation (EGR) Cooling System Performance

That'sa big-a matzo ball! Do anything with it?
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  #6  
Old 04-28-2014, 10:28 AM
sannouni sannouni is offline
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replaced the Glow plugs because he got the code for Glow plug #6 (and we changed the controller because it was close by)
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Old 04-28-2014, 05:36 PM
fdriller9 fdriller9 is online now
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Sounds like you left a charge pipe loose or knocked it loose

No idea what the egr code is about
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  #8  
Old 04-30-2014, 03:26 PM
robster10 robster10 is offline
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Quote:
Originally Posted by sannouni View Post
replaced the Glow plugs because he got the code for Glow plug #6 (and we changed the controller because it was close by)
Then you should have ONLY replaced one (#6). Glow plugs (unlike spark lugs) are used in initial startup then high compression, injection of diesel takes over. Sparkplugs (gassers) are used to start and keep it running 1 of the 4 cycles. You must have shaken something loose. Look over conectors, boost hoses etc.

Last edited by robster10; 04-30-2014 at 03:28 PM.
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  #9  
Old 09-16-2014, 06:44 AM
9mmkungfu 9mmkungfu is offline
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Mein Auto: BMW 335d
I'm having a similar issue with a 335d. What was the resolution?
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  #10  
Old 09-16-2014, 06:58 AM
sannouni sannouni is offline
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We suspected that there was a vacuum leak somewhere... so got a few feet of vacuum hose, while replacing the lines, we discovered that one of the inlets to the vacuum actuators was broken off... Item #1 in the following link (http://www.realoem.com/bmw/showparts...85&hg=11&fg=45) ... we replaced the actuator, and the problem disappeared... and to be honest, it would have probably been possible to glue the nipple back on to the actuator, (the actuator was functioning with no problems)....
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  #11  
Old 09-16-2014, 07:07 AM
9mmkungfu 9mmkungfu is offline
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Thumbs up

Quote:
Originally Posted by sannouni View Post
We suspected that there was a vacuum leak somewhere... so got a few feet of vacuum hose, while replacing the lines, we discovered that one of the inlets to the vacuum actuators was broken off... Item #1 in the following link (http://www.realoem.com/bmw/showparts...85&hg=11&fg=45) ... we replaced the actuator, and the problem disappeared... and to be honest, it would have probably been possible to glue the nipple back on to the actuator, (the actuator was functioning with no problems)....
Well I guess now you have a spare part Thank you for the reply. I'll check for leaks.
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