Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
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
  #1  
Old 10-26-2022, 09:10 PM
Member
 
Join Date: Feb 2018
Location: Half Moon Bay
Posts: 83
syncrocrick is on a distinguished road
P0440 & P0442 code - I could use some help/advices

All right, it's my turn to fight these codes.

First off, I have already installed new OEM gas cap and evap/purge valve.

This started as a P0440, then P0442 added to it a couple weeks ago. I am getting both codes now and they come in immediately after I clear them, as soon as I start the engine. To help me with the diagnostic, I unplugged the evap purge valve and then I got a P0443, so I believe that valve is good.

I think my next step is to get a smoke machine and start digging further.

So here is my question:

-where exactly do I hook the smoke machine? To the large pipe that connects to the purge valve?



This is for a BMW 2003 X5 E53 4.4i M52.

Thank you very much!

Last edited by syncrocrick; 10-26-2022 at 10:53 PM.
Reply With Quote

Sponsored Links

  #2  
Old 10-27-2022, 08:49 AM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 924
X5chemist is on a distinguished road
Bentley has this list for a leak detection.
Fuel filer cap leaking or off.
Fuel tank ventilation lines leaking at fuel tank or activated carbon canister.
Tank ventilation leaking (in engine compartment)
Fuel level sensor and fuel pump assembly cover leaking. (I would give the lock ring a quick tap.)
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #3  
Old 10-27-2022, 09:19 AM
Member
 
Join Date: Jan 2016
Location: Michigan
Posts: 370
ahlem is on a distinguished road
I made a plug that fit into the Intake elbow with a 3/8" hose barb that connects to my home-brewed smoke detector. Frankly it's been very useful in detecting vacuum leaks. I would never use one to test for leaks other than up front at the engine area only... wouldn't want to go viral as that dummy that tried a smoke tester to find a leaky gas tank...
__________________
2001 x5 3.0, 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed,
Reply With Quote
  #4  
Old 11-07-2022, 11:25 PM
Member
 
Join Date: Feb 2018
Location: Half Moon Bay
Posts: 83
syncrocrick is on a distinguished road
So I thought that I had found the problem...the hose connecting to the purge valve did not seem to be "seated" properly. The plastic is brittle and the clamp is half broken

I put it back and secured it with tape. The code was gone just long enough for me to be able to pass smog but it has since came back.

I did try the smoke test prior but could not see any smoke anywhere. Now I guess I have another year to figure it out....in addition to figuring out the coolant leak and the oil leak...
Reply With Quote
  #5  
Old 11-08-2022, 09:32 AM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 924
X5chemist is on a distinguished road
Grab a coolant pressure testing kit from Harbor Freight. It works good enough to use. Use the yellow adapter. Pump to 21 PSI. It should drop no more than 1.5 PSI in two minutes and hold.
Attached Images
 
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
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 10:43 AM.
vBulletin, Copyright 2022, 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.