Hard idle? - AudiWorld Forums



A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004

Hard idle?

Reply
 
 
 
Thread Tools Search this Thread
Old 02-16-2014, 10:51 AM   #1
Audiworld Junior Member
Thread Starter
 
Join Date: Jan 2014
Posts: 96
Default Hard idle?

My A6 began idling rough. It has been for about a week. I put in a octane boost and and an injector cleaner it seems to make it better. Do you think my fuel injectors might be going?
pyrobionic is offline   Reply With Quote
Old 02-16-2014, 01:45 PM   #2
AudiWorld Senior Member
 
Join Date: Jul 2013
Posts: 638
Default

What codes does VAGCOM display? Random misfires???
georgeb944 is offline   Reply With Quote
Old 02-16-2014, 02:34 PM   #3
Audiworld Junior Member
Thread Starter
 
Join Date: Jan 2014
Posts: 96
Default

There is no codes as if right now but about 2months ago I nada ransom misfire. So maybe its the coils?
pyrobionic is offline   Reply With Quote
Old 02-17-2014, 03:58 AM   #4
Tech Guru
 
4Driver4's Avatar
 
Join Date: Oct 2002
Posts: 33,414
Default

Idling rough or skipping? What has changed recently? Work done?

Your injectors are fine. You coil packs are fine. Stop with the snake oils.

How old is the coolant temp sensor?
4Driver4 is offline   Reply With Quote
Old 02-17-2014, 04:58 AM   #5
AudiWorld Senior Member
 
Join Date: Jul 2013
Posts: 638
Default

A current scan with VAGCOM/VCDS will help to isolate any misfiring coil packs, injectors, ICM, or temp sensor. You are stuck in the dark, trying to hit the dartboard without the proper tool.
georgeb944 is offline   Reply With Quote
Old 02-17-2014, 09:00 AM   #6
Audiworld Junior Member
Thread Starter
 
Join Date: Jan 2014
Posts: 96
Default

The only codes VAG displays are EGT sensors And diverted/blow off valves. Bit they aren't popping the engine light.
pyrobionic is offline   Reply With Quote
Old 02-17-2014, 09:04 AM   #7
Tech Guru
 
4Driver4's Avatar
 
Join Date: Oct 2002
Posts: 33,414
Default

Quote:
Originally Posted by pyrobionic View Post
The only codes VAG displays are EGT sensors And diverted/blow off valves. Bit they aren't popping the engine light.
Doesn't matter if the CEL is lit or not.
Codes are clues. Find out what they are telling you. Looks like checking DV performance is a good place to start.
4Driver4 is offline   Reply With Quote
Old 02-17-2014, 10:25 AM   #8
AudiWorld Super User
 
jcman's Avatar
 
Join Date: Jan 2008
Location: NE Ohio
Posts: 2,633
Default Vacuum havoc

Just going to through this one out there because of the really frigid temps this winter and the problems with frozen moisture in the crankcase vent system including the crank vent valve, in December I had similar symptoms with no flashing or steady cel on a 3.0 and this included a 1,000 rpm idle at times until the engine hit operating temp, my remedy was a new crank vent valve with no issues.

I know I'm comparing a non aspirated engine to an aspirated one but the same rule applies with the vent system and vacuum where as my issues included a intermittent cold higher idle.

Check your crank vent valve.
jcman is offline   Reply With Quote
Old 02-17-2014, 10:37 AM   #9
Audiworld Junior Member
Thread Starter
 
Join Date: Jan 2014
Posts: 96
Default

Yeah that's a good point it is single digits at night here.
pyrobionic is offline   Reply With Quote
Old 02-17-2014, 10:51 AM   #10
AudiWorld Super User
 
jcman's Avatar
 
Join Date: Jan 2008
Location: NE Ohio
Posts: 2,633
Default

Quote:
Originally Posted by pyrobionic View Post
Yeah that's a good point it is single digits at night here.
Yep same here along with many days with temps in the teens and its and its been two months of this so far, many short trips over a long period of time exacerbate this problem and a good long highway drive can clear it up to a certain point.

Last edited by jcman; 02-17-2014 at 12:52 PM. Reason: spelling correction
jcman is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Popping/ Thumping Noise from Airbox Junius A8 / S8 (D3 Platform) Discussion 7 08-11-2016 07:48 AM
S8 D3 Power steering whirring noise- Advice please Minimarvel A8 / S8 (D3 Platform) Discussion 3 08-04-2016 05:37 AM
Help with 2005 Audi A6-3.2L quattro BKH bballfreak A6 / S6 (C6 Platform) Discussion 4 10-12-2015 06:14 PM
04 A6 sporadically wont start lbennett12 A6 / S6 (C6 Platform) Discussion 0 09-27-2015 10:18 AM
RPM dips frequently when Idling camcanada Q7 Discussion 0 09-24-2015 06:58 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 10:36 PM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send