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On the road a week and this morning it wouldnt start :(
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

Started the HPFP swap yesterday evening, old one is out, new one is in, but then it started Censored rain on me and getting dark so i retreated until this evening haha! I did find that the pump i was taking out had a connector i reckon may not have been fully clipped into place, and the pressure regulator was sitting in a pool pf oil and diesel mix in the v of the engine, neither was probably helping the situation..  
Post #17886988th Mar 2017 10:11 am
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

HPFP now changed, good and bad news.... It now starts fine, no hesitation to start at all.
However, it still has an intermittent misfire at idle and while accelerating or coasting in gear...

Im starting to suspect injectors again as the issue doesn’t seem to effect acceleration in a way that would indicate fuel starvation from LPFP or HPFP, plus there is , what sounds to me, to be a bit of a diesel knock under hard acceleration, as if there is a bit of misfueling under acceleration.

Can anyone suggest a way to test this theory without having to send the injectors away to be tested? Plugging diagnostics in and reviewing injector pressures at idle seems to be fine, so im at a bit of a loss as to how to test them…  
Post #17889949th Mar 2017 10:01 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10362

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I think I saw on youtube a home grown method for testing injectors.


You remove the leak-off pipes from one side (and plug it, as there is a back feed and it will leak).

Then get 3 identical containers and put one under each injector connected to the leak off point.

Start car, if one container fills up much more quickly than the others, apparently this indicates a suspect injector.

No idea if this will help you  
Post #17890879th Mar 2017 1:21 pm
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Discogaz
 


Member Since: 17 Mar 2014
Location: Bracknell
Posts: 1399

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

I think it was Wheeler Dealers where Ed China was checking the injectors on a FFRR, maybe even the one they resprayed white.  
Post #17891149th Mar 2017 2:12 pm
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

Well... things have gone from bad to worse... driving it yesterday, same intermittent miss, then all of a sudden, a lot more of a lack of power, 'engine malfunction' on the dash, limp mode, pulled in , swiched off, turned back on, and it drove away again with no limo mode. brought it to the shed, couldnt see anything wronk, brought it for a 'spirited' drive to see did that exaggerate any of the symptoms, pulled back into the shed, and there was a load of white smoke form the engine bay, opened it up and there was a leak from the HP hose going from the rail with the pressure sensor on it, to the P/S rail.

I thought, great! easy fix, ill tighten it up!, so i did, brought it for another spin, definitely better, but still had the miss.. left it sitting at idle for a while, switched it off, switched it back on, and engine fault again, now sounds like its running on 5, wont clear the engine fault when swiched off and on Sad

went and tore it all apart again, spanner checked each of the HP lines, all good, no visible leaks, but still sounds like its on 5 and 'engine malfunction' Sad  
Post #178948210th Mar 2017 10:48 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10362

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

What fault codes you got ?  
Post #178954410th Mar 2017 1:03 pm
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

typically enough, the diagnostic computer i bought wont talk to the disco, so i dont know yet, getting it checked in about an hour, so ill know more then!  
Post #178954710th Mar 2017 1:05 pm
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Skynet
 


Member Since: 23 Jul 2014
Location: Melksham, Wiltshire
Posts: 868

United Kingdom 2016 Discovery 4 3.0 SDV6 SE Auto Alaska WhiteDiscovery 4

Partially blocked injector? Dave
D3 2006 HSE, Cairns Blue - gone
D4 2016 SE, White

Wessex 4x4 Response
http://www.wessex4x4response.org.uk/  
Post #178954810th Mar 2017 1:08 pm
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

Before the codes were cleared:

[URL=]
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Immediately after codes were cleared:

[URL=]
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So the first two codes, p0087 and 0120f are most likely stored since before i changed the HPFP, so for now im disregarding them, the others seem to point to cylinder 3 injector being goosed!

Anyone any thoughts on this?

cheers, c

Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated Mr. Green   
Post #178961010th Mar 2017 3:25 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10362

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

yeap something wrong with that cylinder!

injector is the easiest thing to change  
Post #178966910th Mar 2017 5:31 pm
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

would i be correct in thinking the cylinder 4 issues would be related to compensation for cylinder 3 spitting the dummy out?  
Post #178967110th Mar 2017 5:33 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10362

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

yeah I have seen that before.  
Post #178969810th Mar 2017 6:27 pm
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

well, no luck so far.. changed both cylinder 3 & 4 injectors, one by one, with a test drive between, still a small bit of a miss on acceleration, then eventually 'engine malfunction' under heavy acceleration. going to plug it in again this evening and see what comes up this time Smile  
Post #179067313th Mar 2017 9:45 am
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Lockey
 


Member Since: 13 Dec 2016
Location: Limerick
Posts: 111

Ireland 2005 Discovery 3 TDV6 Commercial Manual Mariana BlackDiscovery 3

Finally some good news!

The disco finally has a clean bill of mechanical health! I eventually tracked the fault to cylinder 3, D/S Rear, where it turned out the injector seat was caked in soot and carbon, a quick clean of the injector seat, new washer, and its running like a swiss watch!

...Hopefully it keeps going for a while now Razz

Cheers lads!  
Post #179172815th Mar 2017 10:13 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10362

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

The seat in the head ?  
Post #179181015th Mar 2017 1:14 pm
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