mpg is down after running the s3 hose kit, any ideas why?
11-16-2006, 07:00 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2004
Posts: 1,330
Likes: 0
Received 0 Likes
on
0 Posts
mpg is down after running the s3 hose kit, any ideas why?
First cel I got said lean banks 1 & 2. Since then mpg is down to 17. Before it was around 20 in the city. Any ideas? Bad o2 sensors or clogged injectors?
11-17-2006, 03:22 AM
#4
Top 10 list of possibilities found in the past listed in order of frequency/occurence...
1. Old or generic (spliced-in) O2 sensor(s)
2. Vacuum leak
3. Intake leak
4. Dirty MAF sensor wires
5. Improperly bored MAF housing
6. Improperly metered sensor orifice diameter
7. Bad MAF sensor or dirty terminals/plug
8. No airbox VS/turbulence past MAF sensor
9. Dirty/restricted or clogged air filter
10. Improperly routed vacuum lines (IM switch-over malfunction)
2. Vacuum leak
3. Intake leak
4. Dirty MAF sensor wires
5. Improperly bored MAF housing
6. Improperly metered sensor orifice diameter
7. Bad MAF sensor or dirty terminals/plug
8. No airbox VS/turbulence past MAF sensor
9. Dirty/restricted or clogged air filter
10. Improperly routed vacuum lines (IM switch-over malfunction)
11-17-2006, 02:03 PM
#6
AudiWorld Member
Join Date: Mar 2006
Posts: 119
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hoses ... heads up ...
Not sure if you've read in the past here about getting the BMW vac hoses over the Audi ones. The diameter escapes me now but here is the part number I got from my local BMW dealer: 517 312 579 71. It's supposed to be cheaper and better.
Thread
Thread Starter
Forum
Replies
Last Post
UR-maninblack
Audi Original "S" Cars
3
04-23-2008 05:54 AM
TTaipan
TT (Mk1) Discussion
4
09-28-2007 06:35 AM
S4AVT
S4 / RS4 (B5 Platform) Discussion
7
08-14-2006 05:35 PM
VAP
12v V6 Discussion
17
05-28-2004 04:32 AM
Johannes Erdfelt
S4 / RS4 (B5 Platform) Discussion
5
10-16-2001 01:42 PM