Go Back   5Series.net - Forums > E60 5 Series (2004 - 2010) > E60 Discussion
Sign in using an external account
Register Forgot Password?

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 12-16-2009, 06:45 PM   #1
Members
 
Join Date: May 2008
Posts: 22
Default

I have a 05 545i with 50K miles. Every 1-2 months, the check engine light (codes: random misfire and increased emissions) triggers due to cold engine random misfire. I have brought car to the dealer about 7-8 times. Dealer has changed valvetronics, seals for smoke exhaust, cleaned injectors, checked plugs, checked all sensors but engine still misfires every 1-2 months. No loss in power or performance after misfire. Dealer said to switch Shell 93 gas to Chevron 93 but engine still misfires sometimes at start-up. I don't use junk stuff in my gas. Dealer said it is not due to bad O2 sensors. I have also cleaned the air throttle body and flaps. Car is super clean and is well taken care of. Dealer has checked everything but still can't figure out. Anyone has similar problems? Any help would be appreciated.
bmwdoodle is offline   Reply With Quote
Old 12-16-2009, 08:42 PM   #2
Contributors
 
miguex's Avatar
 
Join Date: Dec 2007
Location: Calgary, AB - Canada / Buenos Aires - Argentina
Posts: 1,710
Default

it sounds like faulty spark plugs or ignition coils.... have u checked them?
__________________
2006 ///M5 New mods: RPI goodies & ECU remaped by ECUPROGRAM! wow!
2004 545i [Gone but not forgotten]
------------------------------------------------------------------------------------------------------------------------------------------------------
"Muchas veces me dicen "vos sos dios", y yo les digo "estan equivocados". Dios es Dios y yo simplemente soy un jugador de futbol." Maradona
BMW CCA - Join
Fast Times Newletters - BMW DIY
----------------------------------------------
ECUPROGRAM Chiptuning

ECU REMAP by ECUPROGRAM.com FOR e60: (Prices are $100 off from the originals for 5series members only)
530i M54 / N52 (~15-20 hp / 18-25 torque) $399
535i N54 (~80 hp / 94 torque) $599
545i and 550i N62(18-24 hp / 20-25 torque) $499
M5 / M6 S85 (~25 hp / 18 torque) $899


E60 Cluster Coding:
Convert from non-M cluster into M5 cluster (same cluster but need new gauges and needles)
Have a used cluster and want to uncode or reset it ?
See my feedback: http://forums.5series.net/topic/8972...1#entry1061259
miguex is offline   Reply With Quote
Old 12-17-2009, 05:14 AM   #3
Contributors
 
Join Date: Dec 2008
Location: Princeton Junction, NJ
Posts: 302
Default

I would start with cleaning the MAF, make sure you connect it before you turn the ignition on or else it will throw a code.
CRC makes such a cleaner. I had a similar problem with my E46 that was fixed with a quick clean. It is good to clean your MAF every few yrs anyway.
If that doesn't clear the problem, we can look into other options. Don't throw any $$ away just yet.
Is the car throwing any codes?
Raj
__________________
2006 BMW 530i
2004 BMW 330i ZHP
1994 Porsche 968 turbo S replica
1994 Porsche 968 cabriolet
968turboS is offline   Reply With Quote
Old 12-17-2009, 05:40 AM   #4
Members
 
Join Date: May 2008
Posts: 22
Default

Yeah, dealer checked plugs etc...all good. Yes, MAF has been cleaned many times...it is throwing codes for random misfires. Is there a PCV valve? Maybe that's dirty...I have a feeling something is dirty or stuck. Again, the car does not have performance problems...everything runs very normal even after the check engine light triggers with same misfire codes. It's just irritating and dealer probably spent $15K under warranty and still can't figure out. Dealer said 545i engine is very sensitive...I think that's why bmw came up with new 550i engine a few years back.
bmwdoodle is offline   Reply With Quote
Old 12-17-2009, 05:41 AM   #5
Members
 
Join Date: May 2008
Posts: 22
Default

see my response above.
bmwdoodle is offline   Reply With Quote
Old 12-17-2009, 05:52 AM   #6
Members
 
Join Date: Nov 2008
Location: So. Utah
Posts: 70
Default

Quote:
Originally Posted by bmwdoodle' post='1075184' date='Dec 17 2009, 07:40 AM
Yeah, dealer checked plugs etc...all good. Yes, MAF has been cleaned many times...it is throwing codes for random misfires. Is there a PCV valve? Maybe that's dirty...I have a feeling something is dirty or stuck. Again, the car does not have performance problems...everything runs very normal even after the check engine light triggers with same misfire codes. It's just irritating and dealer probably spent $15K under warranty and still can't figure out. Dealer said 545i engine is very sensitive...I think that's why bmw came up with new 550i engine a few years back.

Check the pressure regulating valves. Located on the side of each head. Check out this thread Pressure regulating valve. Never had the misfire's though, but did get the increased emissions several times. Very easy and cheap fix. Hope it helps
__________________
2004 545i ~ Sport ~ Navigation ~ Cold Weather Pkg ~ Titanium Silver ~ Magnaflow 14816 ~ Dinan Foot Pedals ~ Smoked Tails ~ Charcoal Filter Removed ~ Hardwired Passport 9500i

njmarro is offline   Reply With Quote
Old 12-17-2009, 06:07 AM   #7
Members
 
Join Date: May 2008
Posts: 22
Default

Thanks so much..I have been looking for the "PCV" valve as I want to clean it. Yeah, I am sure the pressure regulating valve is dirty. I will clean it or replace. Thanks again.
bmwdoodle is offline   Reply With Quote
Old 12-17-2009, 06:32 AM   #8
Contributors
 
Join Date: Dec 2008
Location: Princeton Junction, NJ
Posts: 302
Default

I think they call it CCV in BMW terms, or Crank Case Ventilation Valve. It's a common problem with other models where the engine oil temps don't get high enough from short distance driving and ultimately coke up the CCV.
I am not too familiar where this valve would be on a 545i but you might to try realoem.com and surf thru pages and see if you can find it.
Good luck.
Raj
__________________
2006 BMW 530i
2004 BMW 330i ZHP
1994 Porsche 968 turbo S replica
1994 Porsche 968 cabriolet
968turboS is offline   Reply With Quote
Old 12-17-2009, 06:32 AM
 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 06:23 PM.


All content Copyright 2012 by Internet Brands, Inc.