Go Back   Jaguar Forums - Jaguar Enthusiasts Forum > Jaguar Models ( Modern ) > XJ ( X308 ) XJ8 / XJR
Sign in using an external account
Register Forgot Password?
Search

XJ ( X308 ) XJ8 / XJR 1997 - 2003

Welcome to Jaguar Forums!
Welcome to JaguarForums.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Jaguar Forums community today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-19-2009, 10:19 AM
Junior Member
 
Join Date: Aug 2009
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Default XJ8 hard starting and stalling

We have a 1998 Jaguar XJ8 with about 50,000 miles. I recently posted about a condition that every once in a while the car loses power and stalls. Pull over to the side of the road and it fires right up with no problem. This has happened about 4 times over the last 2 months. Recently the car has become very hard to start when sitting for more than a few hours. If you don't touch the throttle and start cranking, the engine gets to the point where it fires and as soon as you let of the key it stalls. I have found that the only way to start it is to floor it and when it fires let it rev up to about 2000 rpm momentarily and it runs fine. It usually gives a puff of blue/black smoke. I listened for the fuel pump before cranking and it sounds like it is working. I tried to find the schrader valve on the fuel rail like on the old XJ6 but I could not even find the fuel rail . It is my wife's car and I don't like the idea of her being stranded somewhere. If any of the great minds here can help I will be very thankful.

Does anybody know a reliable jaguar mechanic in the Vancouver BC area. I have heard horror stories about the dealer here.
Reply With Quote
  #2  
Old 10-19-2009, 01:27 PM
Veteran Member
 
Join Date: Mar 2008
Location: Ellijay
Posts: 4,108
Thanked 583 Times in 506 Posts
Default

Take a look at Service Action S514 in this link:

http://jaguarforums.com/forum/showthread.php?t=25334

The stalling while driving and restarting is a direct symptom of the throttle body issue addressed in that SA. Can't comment on the other issues.

The free replacement of affected TBs has been extended until the end of this year.
__________________
2002 XK8
2001 Honda GL1800A
1982 Volvo 245 Ford 302 V8 http://forums.turbobricks.com/showthread.php?t=250257
1981 Volvo Bertone Coupe - 25k original miles http://forums.turbobricks.com/showthread.php?t=256460
Reply With Quote
  #3  
Old 10-23-2009, 05:54 PM
Junior Member
 
Join Date: Aug 2009
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Default The stalling has cured itself now the hard starting is getting bad

The car has not stalled while driving for a couple of weeks now (fingers crossed). I checked with the dealer and this car had the upgraded throttle body in 2004 about 15,000 miles ago.

Now the car is an absolute bear to start if it has been sitting a long time. In the morning or after work when it has been sitting for 8 hours. If we drive the car at lunch it starts normally and again after work no problem.

I am thinking the fuel pressure is leaking down,but then I turn the key on and wait 20 - 30 seconds for the fuel rails to pressurize and it does not help. The only way to start the car when cold is to hold the throttle to the floor and crank it. When it starts it races to about 2000 rpm and it drives fine. If it isn't raced up a bit on start it cranks until it catches but immediately you let the key go it stalls.

Any thoughts.
Reply With Quote
  #4  
Old 10-23-2009, 06:48 PM
Veteran Member
 
Join Date: Mar 2008
Location: Ellijay
Posts: 4,108
Thanked 583 Times in 506 Posts
Default

Complete guess but cars or your era were famous for fuel management problems leading to excess fuel in the cylinders. The excess fuel washed down the oil on the cylinder walls and the result was loss of compression. Mostly attributed to short drives but my uninformed opinion is that there were other issues involved.
__________________
2002 XK8
2001 Honda GL1800A
1982 Volvo 245 Ford 302 V8 http://forums.turbobricks.com/showthread.php?t=250257
1981 Volvo Bertone Coupe - 25k original miles http://forums.turbobricks.com/showthread.php?t=256460
Reply With Quote
  #5  
Old 11-07-2009, 11:42 AM
Photobucket
 
Join Date: Jan 2008
Location: 33498
Posts: 2,961
Thanks: 0
Thanked 35 Times in 28 Posts
Default

Part load breather needs to be cleaned also. If battery is weak, slight extended crank will cause fuel dump and flooding.
Failing tensioners is also a contributing factor to hard starts.
Fuel pump check valve sticking can also cause fuel to drain back to tank but will only cause extended crank for about 5 seconds while pressure builds.
Leaking injectors also.
__________________
If it ain't broke, don't fix it!!!
Reply With Quote
  #6  
Old 11-11-2009, 04:48 PM
Junior Member
 
Join Date: Aug 2009
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Wink Start problem was caused by a bad crank sensor

I purchased a proscan reader but could not get ot to work. I finally got it stated and took it to a Jag mechanic. He read the code and replaced a crank sensor. It has started perfectly since.
Thanks for all the replies.
Reply With Quote
  #7  
Old 11-11-2009, 05:26 PM
Veteran Member
 
Join Date: Mar 2008
Location: Ellijay
Posts: 4,108
Thanked 583 Times in 506 Posts
Default

Thanks for the feedback!
__________________
2002 XK8
2001 Honda GL1800A
1982 Volvo 245 Ford 302 V8 http://forums.turbobricks.com/showthread.php?t=250257
1981 Volvo Bertone Coupe - 25k original miles http://forums.turbobricks.com/showthread.php?t=256460
Reply With Quote
Old 11-11-2009, 05:26 PM
 
 
 
Reply



Tags
1998, change, driving, engine, forum, fuel, hard, jaguar, pump, stall, stalls, start, vehicle, xj8, xjr, xk8, xkr



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 04:04 AM.

Copyright © 2010 Internet Brands, Inc. All rights reserved.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014 vBulletin Solutions, Inc. All rights reserved.
SEO by vBSEO ©2010, Crawlability, Inc.
JAGUAR and its logo are the registered trademarks of Jaguar Cars Limited. Jaguar Cars Limited is not affiliated with JaguarForums.com.