Need help with 17545, 17547
10-04-2007, 07:21 PM
#11
Member
Join Date: May 2001
Posts: 3,703
Likes: 0
Received 0 Likes
on
0 Posts
Interestingly I have NEVER gotten an Audi to run without the MAF plugged in.
I have seen a bunch of bad maf's this year, mostly Bosch due to age, BUT, I have seen a couple of Hitachis go.
10-04-2007, 07:59 PM
#13
AudiWorld Senior Member
Join Date: May 2003
Posts: 1,024
Likes: 0
Received 0 Likes
on
0 Posts
I think the major factor for the MAF is the RPM and the boost pressure. Mine is round 200. If an air
leak post-turbo and the boost pressure being OK, then the MAF should be higher than normal, and it will come with rich condition. If an air leak pre-turbo will make the MAF lower, and it will come with lean condition.
17545 and 17547 are rich condition at idle. I think skidmark's suggestion should be checked first.
17545 and 17547 are rich condition at idle. I think skidmark's suggestion should be checked first.
10-05-2007, 01:52 AM
#15
AudiWorld Senior Member
Join Date: Nov 2000
Posts: 1,041
Likes: 0
Received 0 Likes
on
0 Posts
The code is for idle condition, (Add) load is multiplicative(multi)
your problem is not while running down the road but at no load such ad idle, still could be MAF sensor.
10-05-2007, 02:06 AM
#16
AudiWorld Super User
Thread Starter
thats true. I never get the code under load. Usually after coasting down.
not much load. Wondering if the FPR is not holding or a very small vacuum leak. I'll make another run and check block 211 and pressure test the system. Thanks for the insights and analysis..
10-05-2007, 05:57 AM
#18
AudiWorld Super User
Thread Starter
here is my block 211 values. A definite difference from map value
to MAF value. Just cleaned the MAF with Carb Cleaner will make another run. So is the consensus a bad MAF if cleaning doesn't change things or should I still pressure test the system?
<img src="http://pictureposter.audiworld.com/80294/10-5-2007log-003-031-211.jpg">
<img src="http://pictureposter.audiworld.com/80294/10-5-2007log-003-031-211.jpg">