2005 3.0 (V6) Color Coded Vacuum Lines (w/pics) FAQ
#1
![Default](/forum/images/icons/icon1.gif)
In an effort to aid in the infamous P0171 and P0174 codes that lead to a lean running condition, I have color coded all vacuum lines.
I believe that the following pictures will go from MY (Model Year) 2003 on up. There seems to be some confusion with 1 vacuum elbow located under the lower intake manifold. I believe this elbow is on MY 2002 and older, this ais a known failure. Heres a link to replace them: http://jagrepair.com/VacuumLeakSType2000.htm <--THANK YOU GUS!! There is also a rubber elbow located at the back of the upper intake as well taht is a common failure as well for the MYs 1999~2002
To check for vacuum leaks use either carb cleaner or water in a misting bottle. Remove the plastic engine cover to access all lines. Run vehicle and liberally spray down vacuum lines one at a time, if the engine revs up or down, time for futher inspection.
Included as well are MAF Sensor location and IMT O-Rings. The above is the first place to start in hunting down the P0171 and P0174 codes.
This link will aid in diagnosing if the IMT O-Rings are bad: https://www.jaguarforums.com/forum/s...ck-pics-49214/
**PLEASE NOTE** I am not a computer guru nor a tech, if you cannot read the text, save pictures and enlarge.
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/9323d1302227746-2005-3-0-v6-color-coded-vacuum-lines-w-pics-faq-color.jpg)
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/9324d1302227769-2005-3-0-v6-color-coded-vacuum-lines-w-pics-faq-color-2.jpg)
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/9325d1302227801-2005-3-0-v6-color-coded-vacuum-lines-w-pics-faq-color-3.jpg)
In above picture, the Fuel Pressure Regulator Vacuum Line is just a short 90 degree elbow. No visable picture able to be taken.
I believe that the following pictures will go from MY (Model Year) 2003 on up. There seems to be some confusion with 1 vacuum elbow located under the lower intake manifold. I believe this elbow is on MY 2002 and older, this ais a known failure. Heres a link to replace them: http://jagrepair.com/VacuumLeakSType2000.htm <--THANK YOU GUS!! There is also a rubber elbow located at the back of the upper intake as well taht is a common failure as well for the MYs 1999~2002
To check for vacuum leaks use either carb cleaner or water in a misting bottle. Remove the plastic engine cover to access all lines. Run vehicle and liberally spray down vacuum lines one at a time, if the engine revs up or down, time for futher inspection.
Included as well are MAF Sensor location and IMT O-Rings. The above is the first place to start in hunting down the P0171 and P0174 codes.
This link will aid in diagnosing if the IMT O-Rings are bad: https://www.jaguarforums.com/forum/s...ck-pics-49214/
**PLEASE NOTE** I am not a computer guru nor a tech, if you cannot read the text, save pictures and enlarge.
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/9323d1302227746-2005-3-0-v6-color-coded-vacuum-lines-w-pics-faq-color.jpg)
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/9324d1302227769-2005-3-0-v6-color-coded-vacuum-lines-w-pics-faq-color-2.jpg)
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/9325d1302227801-2005-3-0-v6-color-coded-vacuum-lines-w-pics-faq-color-3.jpg)
In above picture, the Fuel Pressure Regulator Vacuum Line is just a short 90 degree elbow. No visable picture able to be taken.
Last edited by joycesjag; 03-14-2012 at 11:41 AM. Reason: changed Gus's link
The following 18 users liked this post by joycesjag:
ags (04-24-2013),
aholbro1 (04-09-2011),
Amadauss (03-29-2012),
Boog (06-20-2013),
Danny Hamby (04-06-2016),
and 13 others liked this post.
#2
#3
#4
The following users liked this post:
Reklaw1973 (12-18-2019)
#5
#6
Join Date: Oct 2007
Location: PHX some of the time
Posts: 117,538
Received 6,330 Likes
on
5,516 Posts
#7
Trending Topics
#8
#9
![Default](/forum/images/icons/icon1.gif)
thanks alot Rick.!! iver been dealing with both those codes for over a week now, and since i dont have a scanner that reads live data, its been really difficult for me to diagnose the problem.. this will be great help in me checking for vacume leaks on my own..
your engine bay seems a little different than that of my STR.. do you think that would mean any significant difference in how the vacume lines are setup?? i hope not.!! Thanks again.!
your engine bay seems a little different than that of my STR.. do you think that would mean any significant difference in how the vacume lines are setup?? i hope not.!! Thanks again.!
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
#10
#11
#12
#13
Join Date: Mar 2013
Location: Pawleys Island, SC USA (formerly from Tabernacle, NJ USA)
Posts: 3,018
Received 182 Likes
on
158 Posts
![Default](/forum/images/icons/icon1.gif)
Steve
The following users liked this post:
joycesjag (04-30-2013)
#15
Thread
Thread Starter
Forum
Replies
Last Post
clubairth1
S-Type / S type R Supercharged V8 ( X200 )
29
05-10-2024 12:57 PM
dmatthewman
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
1
09-30-2015 10:10 AM
Paulie710
S-Type / S type R Supercharged V8 ( X200 )
0
09-28-2015 03:49 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)