Why would a Jag running on 91 be knocking and pinging?
#2
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,831
Received 10,880 Likes
on
7,154 Posts
#3
#4
#5
#6
![Default](/forum/images/icons/icon1.gif)
although, on that note try an octane booster and see if that helps
![](http://i41.tinypic.com/2zpl952.jpg)
Last edited by limegreenclown; 01-21-2012 at 11:51 PM.
#7
![Default](/forum/images/icons/icon1.gif)
Here in Aus the recommendation is that they be run on Premium (96 Octane) fuel. Running them on 91 would void the engine warranty here if the car was still under it. Ask Brutal (Forum Senior) for the answer, but don't keep driving it if pinging (pre-detonation) continues. It will end up buring a hole in your wallet as well as a piston or two.
Cheers,
Languid
Cheers,
Languid
Trending Topics
#8
#9
![Default](/forum/images/icons/icon1.gif)
the highest octane I can find in central texas is 93 octane, and thats higher than you will find in most parts of the US(except near racetracks they sell 100 octane) so 98 is a bit higher than most of us have access to
although, on that note try an octane booster and see if that helps
although, on that note try an octane booster and see if that helps
#10
Join Date: Oct 2009
Location: Perth Ontario Canada
Posts: 11,058
Received 2,263 Likes
on
1,845 Posts
![Default](/forum/images/icons/icon1.gif)
Very true- North America uses a different rating system from the rest of the world. 91 in Canada and the USA is 95-96 everywhere else.
#12
#13
![Default](/forum/images/icons/icon1.gif)
It was the exaust manifold gasket AGAIN. It had just been replaced in Sept 2011. At least it was free to fix but why would it wear out that fast?
#14
![Default](/forum/images/icons/icon1.gif)
Steve,
The only reason I can think of immediately, is that the flange(s) are warped, allowing exhaust gases to slowly escape which will gradually 'eat' away the gasket until it becomes noticable. Putting a straight edge across the flange will tell you. I should think it would be pretty hard to detect otherwise, until the problem reappears.
Cheers,
Languid
The only reason I can think of immediately, is that the flange(s) are warped, allowing exhaust gases to slowly escape which will gradually 'eat' away the gasket until it becomes noticable. Putting a straight edge across the flange will tell you. I should think it would be pretty hard to detect otherwise, until the problem reappears.
Cheers,
Languid
Thread
Thread Starter
Forum
Replies
Last Post
BrentGardner
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
28
04-26-2024 03:08 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)