A6 / S6 (C6 Platform) Discussion Discussion forum for the C6 Audi A6 produced from 2004-present and Audi S6 produced from 2007-present

Stuttering during hard acceleration

 
Old 05-17-2019, 09:21 PM
  #1  
AudiWorld Junior Member
Thread Starter
 
Join Date: Dec 2014
Posts: 15
Default Stuttering during hard acceleration

I've got a 2008 A6 4.2 v8. During hard acceleration the car tends to stutter a bit and threw a check engine code as running lean. Changed the MAF sensor already. From what I understand, it could either be a bad or clogged fuel filter or the fuel injectors going out that is causing the issue. Any thoughts as to what may be causing this issue?
DanXstatic is offline  
Old 05-18-2019, 04:59 AM
  #2  
AudiWorld Senior Member
 
Join Date: Sep 2004
Posts: 1,851
Default

Any codes for the O2 sensors?? Those dictate fuel ratio as well.

maybe one of the coil packs are failing? (My old Navigator did the same thing, changed all the coils and fixed it)
Sallad is offline  
Old 05-20-2019, 06:34 PM
  #3  
AudiWorld Junior Member
Thread Starter
 
Join Date: Dec 2014
Posts: 15
Default

Yes. The code is p0171 bank 1 running lean which is the o2 sensor reading lean exhaust. This is why I think it has something to do with the fuel delivery system somewhere. From what I've read, if it's not the MAF sensor then it is most likely something there. Thoughts?

Last edited by DanXstatic; 05-20-2019 at 06:37 PM.
DanXstatic is offline  
Old 05-21-2019, 03:53 PM
  #4  
AudiWorld Junior Member
Thread Starter
 
Join Date: Dec 2014
Posts: 15
Default

Upon reading another thread, I think it could be one or more of the coil packs misfiring. Someone else was also having this issue. And they also said that their CEL would flash when it was stuttering hard. Mine does the same thing. Almost everyone on the thread was saying that it's probably the coil packs misfiring.
DanXstatic is offline  
Old 05-21-2019, 08:53 PM
  #5  
AudiWorld Senior Member
 
Join Date: Sep 2004
Posts: 1,851
Default

Could also be the ACTUAL O2 sensor that is failing.
Sallad is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ThermalX
A4 (B5 Platform) Discussion
7
05-21-2019 03:55 PM
Marius Karstad
A6 / S6 (C5 Platform) Discussion
22
05-08-2017 08:47 AM
S4ucy
Off-topic Discussion
0
10-15-2008 05:17 PM
Quattrocket
A4 (B5 Platform) Discussion
14
03-14-2005 07:27 AM


Thread Tools
Search this Thread
Quick Reply: Stuttering during hard acceleration


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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: