Garage Support

Back to Forum

Post a Response

Jaguar XJS 2.7 2007 - MAF reading, code P0100 #

Posted by Andy Broomhead on March 1, 2018, 12:27 am

Year of Manufacture *: 2007
( Optional ) Engine Code or CC: 2.7

Hi all

I have been asked to look at this vehicle which keeps flagging a P0100 code.
The vehicle looks to have had both egr valves and both turbos replaced very recently.
The supply and earth at both MAFs are correct but they are digital type so i have no output figures, however.... the snapon verus does give a g/s output data figure which it must calculate itself from the frequency, and they show bank b about 30% lower than bank a.
But as the g/s figures given are much lower than I would expect from a normal MAF, being 12 on bank A and 8 on Bank B, has anyone using a snapon scanner ever noticed what they read on this engine in any of its fitments.
Thanks
Andy

Re: jaguar xjs MAF reading

Posted by aidan birley <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on March 1, 2018, 8:21 am, in reply to "jaguar xjs MAF reading"
Aidan Birley

Hi
Not very familiar with Jags but think some have a balance / cross over valve in the inlet system to balance the two banks, known to fail.

Aidan

Re: jaguar xjs MAF reading

Posted by sean savage <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT5559' width='330' height='300' border=0 style='border:none;'> on March 2, 2018, 3:53 pm, in reply to "Re: jaguar xjs MAF reading"
Sean Savage

Aiden is correct check the balance valve up front centre of engine flap seizes and can usually be freed off

Re: jaguar xjs MAF reading

Posted by Simon Kefford <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3159' width='330' height='300' border=0 style='border:none;'> on March 3, 2018, 11:36 am, in reply to "Re: jaguar xjs MAF reading"
Simon Kefford

Good advice - if no fault there - Smoke it!

The inlet manifolds are known to split.

Si

Re: jaguar xjs MAF reading

Posted by Colin Hedger <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1335' width='330' height='300' border=0 style='border:none;'> on March 3, 2018, 10:58 pm, in reply to "Re: jaguar xjs MAF reading"
Colin Hedger

Andy - this cant be an XJS as they stopped making those in the mid 90's !
Do you mean an XF 2.7 diesel?

Colin.

Re: jaguar xjs MAF reading

Posted by Andy Broomhead on March 4, 2018, 10:26 pm, in reply to "Re: jaguar xjs MAF reading"
Edited by board administrator March 9, 2018, 1:31 pm

Sorry it’s an xj6.
Had Friday as a snow day so haven’t smoked it myself but garage who gave it to me did.
Now weather has improved I will be able to road test it properly and graph some data under load.

Re: jaguar xjs MAF reading

Posted by Ian slattery <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1196' width='330' height='300' border=0 style='border:none;'> on March 5, 2018, 7:10 pm, in reply to "Re: jaguar xjs MAF reading"
Ian Slattery

Hi Andy

This maybe on earlier models but if its got vacuum operated manifold flaps. Worth checking for split diaphragms.

Regards Ian

« Back to index

[ Garage Support ]

Copyright © uk autotalk