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Elsa_My first Jag_1994 3.2s

Elsa_jag
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Re: Elsa_My first Jag_1994 3.2s

Postby Elsa_jag » Tue Jul 10, 2018 4:44 pm

old del boy wrote:
Elsa_jag wrote:
naki_k wrote:Definitely do a battery disconnect whenever changing any sensor. Or the fault code may not clear.


I’ll try that, but what do you think if the hesitation persists?


The other day you ran it up to full temperature so that would suggest there's fuel , the thing that comes to mind when this hesitation happens is lack of spark at the high tension lead from the coil to the distributor [ king lead] , that and general condition of the cap and rotor ,

Derek..


All changed not that long ago (4 years or 1500 miles) but worth a check again.
Regards, Carl

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Elsa_1994 3.2 s/ 61000 miles/ VIN 698892
http://xj40.com/viewtopic.php?f=33&t=1195

old del boy
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Re: Elsa_My first Jag_1994 3.2s

Postby old del boy » Tue Jul 10, 2018 10:59 pm

In situations like this i use substitution to eliminate , i tend to keep old parts when servicing and would swap over the leads to see if there was any improvement , another thought occurred to me , maybe you have a punctured fuel pressure regulator ? , this would account for the lack of fuel just as you need it to accelerate , i'm not sure i remember how you check for this but i think it involves removing a vacuum hose and sniffing for petrol but i forget , maybe someone else can remember :?

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

Rory
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Re: Elsa_My first Jag_1994 3.2s

Postby Rory » Wed Jul 11, 2018 2:38 pm

Carl, I do hope you get this sorted :D.
A right pain... :(
They really don't like not being used...

Rory
___________________________________
1994 3.2 Gold(705363)(2009-13)
1992 4.0 Daimler(662003)(2010-)
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Elsa_jag
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Re: Elsa_My first Jag_1994 3.2s

Postby Elsa_jag » Mon Jul 23, 2018 4:03 pm

I had another frustrating few hours at this today...

Fitted the new alternator, connected the freshly charged battery, cranking, cranking, cranking, not firing.

So back to basics... trust my instincts...

She stinks of fuel, so it’s not ‘no fuel’. She’s turning over lovely and strong, but not firing, not even attempting to.

Check the coil connections (last thing I messed with). No difference. Check the cap, arm, leads plugs, all look ok. Brown colour plugs, a little sooty perhaps, but wet with fuel confirming that that we have fuel.

No fault codes.

Try again with number 1 plug out, this confirms no spark!

What can it be I wonder? On the off chance, Let’s put the old cps back on.

First touch of the key, she started. Turned it off, tried again, she started. Warmed her up, to open thermostat and a touch over N, fans cut in. Rev her up, no hesitation, runs lovely and sounds very good. Turn her off, hot start, first touch of the key she fires and runs beautifully!

This leads me to think that the cps was never the problem, changing it at Wroxhall didn’t fix the problem fully and we had trouble confirming this as she had a CTS issue anyway.

Changing the coil got her running last week, but she wasn’t 100%, still hesitated when revved from tick over and cut out if revved hard.

Old cps, new cts and new coil seems to have done the trick.

I’m going to try her again from cold tomorrow and see how she does. I feel a bit like I’m chasing my shadow here!

I need her right and a few days to build confidence ahead of this weekends run to wales, or I’ll be touching cloth all the way there! :lol:
Regards, Carl

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Elsa_1994 3.2 s/ 61000 miles/ VIN 698892
http://xj40.com/viewtopic.php?f=33&t=1195

donkeyotty
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Re: Elsa_My first Jag_1994 3.2s

Postby donkeyotty » Mon Jul 23, 2018 4:39 pm

Be good if you can make it, we must get 10, we must get 10........ :lol:
1994 Regency Red 4.0 Sovereign M117FVC Chassis 705979
1993 Volvo 940 2.0 Turbo Wentworth Estate

Elsa_jag
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Re: Elsa_My first Jag_1994 3.2s

Postby Elsa_jag » Mon Jul 23, 2018 5:12 pm

donkeyotty wrote:Be good if you can make it, we must get 10, we must get 10........ :lol:


I’m trying!

I’d love to do it, put some miles on the old girl, justify keeping her!
Regards, Carl

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Elsa_1994 3.2 s/ 61000 miles/ VIN 698892
http://xj40.com/viewtopic.php?f=33&t=1195

old del boy
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Re: Elsa_My first Jag_1994 3.2s

Postby old del boy » Mon Jul 23, 2018 11:50 pm

Good to hear you're finally getting somewhere with this , there comes a time when all you can do is re visit all you have done and it usually pays off as in this case , it doesn't help of course the a faulty cps doesn't throw a code but when you have no spark this unit will always come under suspicion .
I think it's definitely true that lack of use will make these cars more problematic , my own scrapper was running fine until a period of no tax but a few weeks later she started throwing FF44 codes and the cooling fans stopped working , it forced me to do a bit of relay and connector cleaning which seems to have cured the FF44 and on investigating the cooling fans relay i found that moisture had got in to it and corroded contacts rendering it inoperative , like yourself , i too need a few journeys in her again to rebuild my faith in her ;)

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

naki_k
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Re: Elsa_My first Jag_1994 3.2s

Postby naki_k » Sun Jul 29, 2018 4:52 pm

Good work Carl. Got there in the end.
Multiple faults can cause all kinds of frustration.
But a thorough approach usually geta a good result.

So is that the new CPS I loaned you thats dead already? :shock:
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Elsa_jag
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Re: Elsa_My first Jag_1994 3.2s

Postby Elsa_jag » Sat Sep 01, 2018 6:14 pm

naki_k wrote:Good work Carl. Got there in the end.
Multiple faults can cause all kinds of frustration.
But a thorough approach usually geta a good result.

So is that the new CPS I loaned you thats dead already? :shock:


So I may have spoke too soon on just how successfully this issue has been fixed!

Returned the spare CPS to Naki at JLR classic meet today, he said he would test it and I would be interested to know the result of that!

I got to JLR no issue, got back to the storage, well 1 mile away and she returned to the Wroxhall state of play :twisted:

Really struggled that last mile, cut out several times, struggled to restart each time. She cut out again going into the lock up (perhaps she just didn’t want to return to storage! :lol: ), so had the indignity of being pushed the last 15 feet!

I suspect the CPS or an overfuelling issue! (She stinks of fuel when she cuts out) I’ll see what Naki says about the spare CPS (if it is broke, I’m unlucky and have been playing with two broken CPS’s) if not CPS, any ideas welcome?

It’s a shame, because for the brief moments she ran well she really did run well, present well and drive well. Kinda knocks the pleasure out of it when the car isn’t reliable!
Regards, Carl

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Elsa_1994 3.2 s/ 61000 miles/ VIN 698892
http://xj40.com/viewtopic.php?f=33&t=1195

NMV 1E
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Re: Elsa_My first Jag_1994 3.2s

Postby NMV 1E » Sat Sep 01, 2018 9:22 pm

You've certainly been through the "wringer" with your car this year ... A box of matches would have come in handy (joking). OK, back to basics suck, squeeze, bang, blow ... The "bang" isn't right by the feel of things ... Ignition and H.T. spark. I'm beginning to think rotor arm again, but from recollection you've changed both the cap and the rotor arm :?:
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