Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #11  
Old 02-09-2019, 09:28 PM
upallnight's Avatar
Member
 
Join Date: Aug 2012
Location: Cook County
Posts: 6,313
upallnight is on a distinguished road
Quote:
Originally Posted by Muleears View Post
The STRANGEST thing just happened. Started the X to go to lunch. As usual it started with a miss, and tripped the SES. Drove it about 3 miles and parked. While parked I decided to clear the codes. Foxwell said cylinders 3,4 and 5 were at fault. I let it run while I cleared the codes and heres the weird part, the instant the codes cleared so did the miss! Normally I would chalk that up to coincidence but this is the second time in as many days it has happened. WHAT is going on? Why would/could clearing a code rectify a misfiring cylinder?
Could be the misfire is associated with a fuel cutoff. Clearing the code clear the misfire counter so the DME isn't shutting off an injector until it reaches a certain number of misfires on the counter.
__________________
2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
Reply With Quote

Sponsored Links

  #12  
Old 02-09-2019, 09:39 PM
Member
 
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 851
80stech is on a distinguished road
There is a ton of stuff that can cause your problem. I would lean towards looking for a vacuum leak to start. It would be nice if you where sure that you are reading all of the codes as there should be a clue as to what else is going on to cause the missfire. When the engine is first started it has the least amount of adaptability to compensate for problems, use that to your advantage to find the problem.
__________________
1988 325is (purchased new)
2004 X5 3.0 (new to me) 2005 X3 2.5 (new to wife)
Reply With Quote
  #13  
Old 02-10-2019, 07:15 AM
Member
 
Join Date: Dec 2018
Location: Tidewater Virginia, USA
Posts: 185
Muleears is on a distinguished road
Quote:
Originally Posted by upallnight View Post
Could be the misfire is associated with a fuel cutoff. Clearing the code clear the misfire counter so the DME isn't shutting off an injector until it reaches a certain number of misfires on the counter.
I think this is exactly it, because it starts with a minor misfire but it won't trip the SES light until it has run a while or the misfire is bad enough to make running very rough.

I have a mity-vac to check vacuum, but I have no clue where to start on the X. Wouldn't a code show for a vacuum leak? I guess I'll do a full scan with the Foxwell, not just the DME and see what turns up. Thank you upallnight you have given me good advice. Thank you also EODguy and 80stech for adding to this. It's 16*F this morning (thats -9C for your smart metric folks), I'll start it shortly and see if its better/worse with the very cold weather.
__________________
Cal
Tidewater Virginia, USA
2005 X5 3.0i 296K miles!
Reply With Quote
  #14  
Old 02-10-2019, 08:46 AM
Member
 
Join Date: Dec 2018
Location: Tidewater Virginia, USA
Posts: 185
Muleears is on a distinguished road
First thing I did was read the codes, a complete scan, before I started it. Nothing found, other than the persistant air bag and side light codes. This mornings cold start yielded the standard lumpy idle, but it did smooth out in about 30 seconds and no SES light. I then read the codes again and the typical misfire of 3+5 showed up, but that was all. Sometimes the misfire stays for several minutes or miles and I have to kill the SES light with the Foxwell. Then it starts and runs fine until the next cold start.

What vacuum leak would go away in less than a minute? It seems to always include cyl. 3. The others vary but 3 is always one of the ones with a miss. Is there a cold start solenoid or circuit that turns off a few seconds after a successful start? Could the injectors be malfunctioning? How hard are they to swap from cyl. to cyl?

Thanks in advance for any additional advice, I'm not sure where to go from here. Coils and plugs are both new.
__________________
Cal
Tidewater Virginia, USA
2005 X5 3.0i 296K miles!
Reply With Quote
  #15  
Old 02-10-2019, 12:51 PM
Member
 
Join Date: Apr 2011
Location: Houston, TX
Posts: 5
Jeff O is on a distinguished road
I am having an idle misfire with my 3.0 X5. Originally my plugs were worn and changing cleared it. I would try a bottle of Techron (larger bottle) and good gas (Shell or Chevron) and see if that helps. Intake deposits or injector deposits can cause this type of problem. Vacuum leaks such as failed PCV hoses or separator or intake boot cracks along with valve cover gasket leak are all common failure points on M54 engine.
Reply With Quote
  #16  
Old 02-10-2019, 03:25 PM
Member
 
Join Date: Dec 2018
Location: Tidewater Virginia, USA
Posts: 185
Muleears is on a distinguished road
Quote:
Originally Posted by Jeff O View Post
I am having an idle misfire with my 3.0 X5. Originally my plugs were worn and changing cleared it. I would try a bottle of Techron (larger bottle) and good gas (Shell or Chevron) and see if that helps. Intake deposits or injector deposits can cause this type of problem. Vacuum leaks such as failed PCV hoses or separator or intake boot cracks along with valve cover gasket leak are all common failure points on M54 engine.
Thanks Jeff O, I generally buy good gas and only premium. The current tank (filled yesterday is Citgo), last tank had a can of Seafoam in it. I'll get a bottle of Techron and give it a try.

As for the vacuum leaks I'll do some research to find where the PCV is on this thing then do some vacuum testing. I've noticed no oil leaks around the VC. The snorkel between the fresh air scoop and the air filter intake hose has a crack but it is on the fresh (unfiltered) side of the air filter, so that shouldn't affect it.

If I run across anything else pertinent I'll post. Thanks again for the help.
__________________
Cal
Tidewater Virginia, USA
2005 X5 3.0i 296K miles!
Reply With Quote
  #17  
Old 02-12-2019, 01:02 PM
Member
 
Join Date: Dec 2018
Location: Tidewater Virginia, USA
Posts: 185
Muleears is on a distinguished road
Could this be weather related?

We have had a cold snap lately (just coming out of it today), I have also noticed some mayo on the dipstick and oil fill cap. I know these are related to the cold weather problem with the EGR valve/system. Temps (when I start in the morning) have been in the teens F. I know thats not cold for some of you but my X, I am sure, doesn't have any cold weather options. I have read this situation can cause an idle misfire? Need I look into this more or am I way off the track? Hopefully it will start well tomorrow morning with the warmer weather. TIA.
__________________
Cal
Tidewater Virginia, USA
2005 X5 3.0i 296K miles!
Reply With Quote
  #18  
Old 02-12-2019, 03:35 PM
upallnight's Avatar
Member
 
Join Date: Aug 2012
Location: Cook County
Posts: 6,313
upallnight is on a distinguished road
Quote:
Originally Posted by Muleears View Post
About two weeks ago I started getting the SES light. I had noticed that it was missing a little when started cold, I figured that was what was tripping the light. Foxwell told me it was cylinders 2+3 acting up. It always smoothed out after running a minute or so. Last week it was taking more time to run on all six, sometimes a couple miles. So I bought two coils and replaced 2+3. Put in a new battery about this time also. I should point out that the plugs were done about 6 weeks ago with iridiums. The new coils initially seemed to fix it, for a day or two anyway. Today when started to come home from work (a 40 mile trip) it was rough again and the SES came back. I drove it home but noted rough running most of the trip. When about 30 miles into the commute it smoothed out and began running smoothly on all six. When I got home Foxwell told me I had misfires on cylinders 3,4,5+6! These must have been intermittant as It wouldn't run on just two! So what I have done is swapped coils 1+3 with each other. #1 has never misfired according to the scanner, so now we'll see if the miss follows the coil or not. If the skip stays in cylinder 3 (with the known good coil) where do I go? Look at injectors? I only run premium and now it has a can of Seafoam in it. I'll report how it runs tomorrow morning with another cold start and 40 mile drive. TIA

If it starts misfiring when you first start up but go away after the engine has run for a while, I would look into a leaky injector. Just like a flooded engine, a flooded cylinder will not run correctly. It is only after the engine has run enough to clear the cylinder that the misfire is no longer present.
__________________
2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
Reply With Quote
  #19  
Old 02-12-2019, 04:00 PM
Member
 
Join Date: Jul 2017
Location: Owensboro, KY - USA
Posts: 124
270_BMW is on a distinguished road
If it is exclusively on 4,5,6 I would check your grounds for that bank. I had an issue with 1,2,3 a couple months ago. Turned out to be a seeping Valve Cover Gasket, was getting oil everywhere and down in the wells, but also shorted out my ground.
__________________
Auto Enthusiast. Tech Expert Extraordinaire.

Current Project
2002 E53 X5 3.0i

Daily Driver
2020 M2 Competition
Reply With Quote
  #20  
Old 02-12-2019, 04:21 PM
Member
 
Join Date: Dec 2018
Location: Tidewater Virginia, USA
Posts: 185
Muleears is on a distinguished road
Quote:
Originally Posted by upallnight View Post
If it starts misfiring when you first start up but go away after the engine has run for a while, I would look into a leaky injector. Just like a flooded engine, a flooded cylinder will not run correctly. It is only after the engine has run enough to clear the cylinder that the misfire is no longer present.
Would this be enough of a misfire to trip the SES light and make the DME shut that cylinder off? If it doesn't smooth out on its own and trips the SES, I have to clear the codes for the misfire(s) and it then runs smoothly.
__________________
Cal
Tidewater Virginia, USA
2005 X5 3.0i 296K miles!
Reply With Quote
Reply

Bookmarks

Thread Tools
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 -4. The time now is 10:01 PM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.