misfire and lean on 1 & 2 - AudiWorld Forums

Go Back  AudiWorld Forums > Audi Models > Audi A4 > A4 (B6 Platform) Discussion
Reload this Page > misfire and lean on 1 & 2
Notices
A4 (B6 Platform) Discussion Discussion forum for the B6 Audi A4 produced from 2002-2005
Sponsored by:
Sponsored by:

misfire and lean on 1 & 2

Reply

 
 
Old 11-08-2017, 10:18 AM
  #1
AudiWorld Newcomer
Thread Starter
 
Join Date: Oct 2017
Posts: 9
Default misfire and lean on 1 & 2

Hi there,

Recently purchased 2004 Audi A4 Quatro 1.8 turbo. Has about 140k on it. When I first got it, we had coolant leak problems and we replaced plugs and coils in addition to changing out almost all plastic components of the coolant system as they were deteriorating horribly. Found another this weekend that we had missed.
Some rough idle issues so we replaced valve cover seal (and thoroughly cleaned the cover and it's in/outlets, also replaced high pressure oil hose from engine to turbo as it was seeping. Still lots of codes coming up.. Cleared them and will check again tomorrow after driving for a bit. Still have an idling problem. Intermittent misfire of #'s 1 and 2 and reading lean on them as well. What are most likely causes a "lean" situation....O2 sensor?
Also, know this car is known for insturment cluster issues, mine is doing this. Anyone know the best place to get a good, relatively inexpensive cluster?
carmitage1015 is offline  
Reply With Quote
Old 11-11-2017, 11:48 AM
  #2
AudiWorld Newcomer
Thread Starter
 
Join Date: Oct 2017
Posts: 9
Default

Bueler, Bueler......?
carmitage1015 is offline  
Reply With Quote
Old 11-11-2017, 05:15 PM
  #3
AudiWorld Super User
 
Join Date: Feb 2010
Location: Fort Worth, Tx
Posts: 2,621
Default

So I don't typically jump in cars that may have multiple issues, but what the heck.

First, no idea on dash board. Maybe someone else has.

Misfires can be caused my multiple things. Single cylinders are usually coilpacks or plugs. Multiple cylinders are usually something wrong with the vacuum system. The issue can be leaks, bad valves, etc. You will have to read up on the vacuum system and start eliminating issues.
lyleswk is offline  
Reply With Quote
Old 11-14-2017, 12:08 PM
  #4
AudiWorld Newcomer
Thread Starter
 
Join Date: Oct 2017
Posts: 9
Default

Appreciate the reply. Thank you and yep, multiple is pointing to vacuum issues on the diagnostics. Starting the hunt for "leaks" or "blockages" now.
carmitage1015 is offline  
Reply With Quote
 
 
 


Thread Tools
Search this Thread
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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 09:53 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: