• Advertisement
Xclusively Jaguar
SNG Barratt
David Marks Garages
Make a donation to XJ40.com

Ratty has a problem

752120
Snr Member
Posts: 1012
Joined: Wed Jun 25, 2014 7:10 am
Location: Warrington Cheshire

Re: Ratty has a problem

Postby 752120 » Mon May 28, 2018 6:22 am

Thanks David for your help. I have followed those links but as sods law has decreed that the photos don't appear on my computer at all. I will have to try to find the earth points on the car by detection.
Absolutely typical of my luck.
:shock: :shock: :shock:

old del boy
Distinguished Mbr
Posts: 6885
Joined: Thu Jul 10, 2008 9:29 am
Location: Kent

Re: Ratty has a problem

Postby old del boy » Mon May 28, 2018 11:17 pm

Here's the diagrams i think you want ,

Image

Image

Image

Image

Derek..
'93 4.0L Daimler, solent blue,
'93 4.0L Daimler, Westminster,
'85 2600 Rover sd1 vdp oporto.

752120
Snr Member
Posts: 1012
Joined: Wed Jun 25, 2014 7:10 am
Location: Warrington Cheshire

Re: Ratty has a problem

Postby 752120 » Tue May 29, 2018 6:55 am

Thanks Derek you are a Star. :D

752120
Snr Member
Posts: 1012
Joined: Wed Jun 25, 2014 7:10 am
Location: Warrington Cheshire

Re: Ratty has a problem

Postby 752120 » Sun Jun 03, 2018 9:29 am

Hi a quick update, just been cleaning earths 4 and 5 under (Derek's diagram) and although they were a bit greasy they seemed to be ok. Turn the car over and FF16. Turned it over again and FF16 has disappeared.
The search still doesn't seem to be working on the forum, so I googled it and it came up with ambient temperature sensor out of range. Is this at all relevant ? or is this blasted car having the proverbial brain fart. Still doesnt start BTW.

stevemc
Web Master
Posts: 640
Joined: Thu Jul 24, 2014 8:13 pm
Location: north wales
Contact:

Re: Ratty has a problem

Postby stevemc » Sun Jun 03, 2018 10:10 pm

Search is working just tested it brings up a second box re type your search in there and works
Jaguar xj40 1986 build D513 NBU vin number ends 504501
Audi A4 Sline 2016
Image

old del boy
Distinguished Mbr
Posts: 6885
Joined: Thu Jul 10, 2008 9:29 am
Location: Kent

Re: Ratty has a problem

Postby old del boy » Sun Jun 03, 2018 11:42 pm

The way it keeps dying on you would suggest a failing fuel pump , a failing cps or a failing ignition system , i think by now i would have replaced the ht leads cap and rotor , [ the rotors can short to earth , you can temporarily apply grease to get you home ] , fitted a new cps and tried another fuel pump , needless to say anything less than a 100% battery will give starting problems so if it's getting on a bit maybe it's time for a new one , we've had many owners on here find their starting problem magically disappear after fitting a new one .

A thought just occurred to me , have you checked the fuel protection module ? , the wiring has been known to burn out , my own '93 car did just this luckily just prior to me buying it ,

Derek..
'93 4.0L Daimler, solent blue,
'93 4.0L Daimler, Westminster,
'85 2600 Rover sd1 vdp oporto.

752120
Snr Member
Posts: 1012
Joined: Wed Jun 25, 2014 7:10 am
Location: Warrington Cheshire

Re: Ratty has a problem

Postby 752120 » Mon Jun 04, 2018 4:49 am

stevemc wrote:Search is working just tested it brings up a second box re type your search in there and works


Thanks Steve

752120
Snr Member
Posts: 1012
Joined: Wed Jun 25, 2014 7:10 am
Location: Warrington Cheshire

Re: Ratty has a problem

Postby 752120 » Mon Jun 04, 2018 5:03 am

old del boy wrote:The way it keeps dying on you would suggest a failing fuel pump , a failing cps or a failing ignition system , i think by now i would have replaced the ht leads cap and rotor , [ the rotors can short to earth , you can temporarily apply grease to get you home ] , fitted a new cps and tried another fuel pump , needless to say anything less than a 100% battery will give starting problems so if it's getting on a bit maybe it's time for a new one , we've had many owners on here find their starting problem magically disappear after fitting a new one .

A thought just occurred to me , have you checked the fuel protection module ? , the wiring has been known to burn out , my own '93 car did just this luckily just prior to me buying it ,

Derek..

Hi Derek, thanks for replying to my post. This is a frustrating problem as the car has a new fuel pump and as fitted by the P.O. he showed me the old ones, A new heavy duty Battery fitted by me a year ago, a new CPS fitted by me a month ago. I am revisiting the ignition , but I have swapped out with known working having two cars like yourself. Where is this fuel protection module? What does it do and how do and how do I diagnose it? It seems the car just doesn't want to be trustworthy at all

katar83
Distinguished Mbr
Posts: 2490
Joined: Tue Aug 23, 2011 11:17 am
Location: Cambridge

Re: Ratty has a problem

Postby katar83 » Mon Jun 04, 2018 8:03 am

I'd go back to basics on this. When it doesn't want to start, spray some easy start multiple times into intake and confirm whether it coughs up or not. If it does - fuel problem, if it doesn't - ignition.
That will halve your work instantly, not much point in guessing atm it seems.
1997, 4.0 LWB X300 - Unlucky car but still a daily driver.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, October 2015. Gone!
1994, 3.2S XJ40 - Long gone.

752120
Snr Member
Posts: 1012
Joined: Wed Jun 25, 2014 7:10 am
Location: Warrington Cheshire

Re: Ratty has a problem

Postby 752120 » Mon Jun 04, 2018 9:00 am

No guessing has not worked at all. When you crank her over she occasionally coughs any how. It has to be ignition. Obviously getting it running last time wasn't curing the fault. I am however not getting any FF codes at all now. So will take plugs out to get rid of flooding, put new rotor arm and dizzy cap clean the other earth's charge the battery and see what happens.


Return to “Engine”

Who is online

Users browsing this forum: No registered users and 2 guests