2000 A6 Cranks but no start ... a solution - AudiWorld Forums

Go Back  AudiWorld Forums > Audi Models > Audi A6 / S6 / RS 6 > A6 / S6 (C5 Platform) Discussion
Reload this Page > 2000 A6 Cranks but no start ... a solution
Notices
A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004
Sponsored by:
Sponsored by:

2000 A6 Cranks but no start ... a solution

Reply

 
 
Old 08-14-2014, 02:50 PM
  #1
AudiWorld Newcomer
Thread Starter
 
Join Date: Aug 2014
Posts: 1
Default 2000 A6 Cranks but no start ... a solution

Vehicle is a 2000 A6 Avant, 2.8L.

The problem is now solved, although there were a few quirks along the way, hence the post.

The symptoms were as posted by others. Running fine, with CEL light on (for a know issue with the secondary air pump), suddenly no start.

STEP 1: scanned for new codes. Nothing new, Cleared the old codes.
STEP 2: Checked fuse #28. No power on input side.
STEP 3: Powered the output side with 12v, fuel pump runs fine.
STEP 4: Removed drivers side knee bolster panel to access relay rack.
STEP 5: While holding Relay 4 (fuel pump relay), turned on ignition. No click heard of felt.
STEP 6: Replaced relay.
STEP 7: still no start ....
STEP 8: check #28, no power on input side.
STEP 9: much time reading forums for answers ... nothing jumped out as a solution.
STEP 10: incantations to the Budweiser god ... (made me feel better, 90 degree NC heat)
STEP 11: Hooked up HD starter booster in case engine crank RPMs were too low
STEP 11: Broke out VAG 5053 and scanned for crank position indicator (engine group 01): Clear output signal following engine crank speed (160-200 rpm).
STEP 12: Cranked engine for a good 45-60 seconds, and she slowly began to fire intermittently ... much black smoke from the exhaust, which quickly cleared after 30 seconds of smooth idling.

Now, when the key is turned, I hear the fuel pump prime (as usual) and she runs just as before.

I have no idea why she eventually fired, but I had seen reference to others who had to hard crank after they had changed the FP relay: maybe when I ran the FP from the 12v line, I flooded the engine ...

Anyway, another couple of Budweiser's were consumed in thanks to a problem solved!
atgordon is offline  
Reply With Quote
 
 
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Quick Cal
4.2 V8 Discussion
5
10-29-2015 09:25 PM
legerrej
A4 (B5 Platform) Discussion
1
09-25-2015 08:43 PM
iowaan
A6 / S6 (C5 Platform) Discussion
17
09-25-2015 01:38 PM
2000BEAST
Q5/SQ5 MKI (8R) Discussion
9
09-14-2015 07:02 AM
rammstien80
2.7T V6 Discussion
0
09-04-2015 04:26 AM

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 06:37 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: