Go Back  AudiForums.com > Audi Models > Audi A6
Sneaky intermittent misfire upon start-up P0300 >

Sneaky intermittent misfire upon start-up P0300

Audi A6 The mid-sized Audi A6 model offers more room to the driver and passengers over the A4 line.

Sneaky intermittent misfire upon start-up P0300

  #1  
Old 04-15-2009, 09:50 AM
Jackmup's Avatar
2nd Gear
Thread Starter
Join Date: Mar 2009
Location: New York
Posts: 1,227
Default Sneaky intermittent misfire upon start-up P0300

The problem: once in a while after, the car has sat. It will have a rough idle (feels like it is breaking up) when I start it. It goes away by the time engine idle kicks down(30seconds or less). It does not return while driving. It does not do it if you restart in a few hours. It does not matter if it is hot or cold out.

I am performing the seafoam treatment, replacing the plugs and coils this weekend and i'll put di-elctric grease on all of my terminals. After reading threads The random misfire has me thinking other things though.Such as faulty connection, cam sensor, ICM or loss in fuel pressure/lazy pump.

Car was full when it did this last. SHELL 93oct. All of my filters are new.

It's a PITA because it doesn't stick around long enough
and it may go a week or two before it does it again.

Anything else I should check out or test would be a big help.
 
  #2  
Old 04-23-2009, 09:42 AM
Jackmup's Avatar
2nd Gear
Thread Starter
Join Date: Mar 2009
Location: New York
Posts: 1,227
Default

codes were P0300 and P0304,
Had a new coil on it. Found a dirty plug but I expect that was because the connection to the injector was mossy and the injector was messing up. It ran 60% better after I cleaned and put di-electric grease on the injector connection. It is perfect now that I have replaced all of the the plugs and coils and cleaned and greased all connections.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
2000audi27
Audi A6
4
02-20-2013 07:30 PM
xx00A6xx
Audi A6
7
04-02-2012 11:24 PM
2.7taudi
Audi A6
0
01-15-2012 07:06 PM
KoolMan
B5 Models
8
12-09-2011 12:03 PM
bottlecap
S Car Model Line
3
12-27-2009 08:54 PM


Thread Tools
Search this Thread
Quick Reply: Sneaky intermittent misfire upon start-up P0300


Advertising
Featured Sponsors

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.