Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
TDV6 engine headaches
OK, So I have a 2008 Jaguar XF 2.7 TDV6. At about 110K, it spins a shell or 6, and is wrecked.
Eventually get a hold of an engine from a rolled Disco 3, and I've fitted the crank, con rods and pistons from the LR engine to the Jaguar engine. Every other part is from the Jag.
Now reassembled and back in the car (I'm NEVER working on one of these engines ever again, they're garbage), and it won't start. Turns over beautifully but makes no attempt to fire.
My fault code reader throws up "Camshaft Position Sensor range/performance" every single time you turn it over, but I've fitted a brand new sensor and it's still the same.
I got a friend over with the JLR diagnostic tool and it also shows a fault with "Fuel Pump authorisation", but otherwise we're stumped.
Any clues here folk? This car is really beginning to p*** me right off.
Disco_Mikey should be able to help. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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Have tried the Fuel Lift Pump procedure to see if its that.?
Flack
16th Feb 2015 10:53 am
Ayrshore2
Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
Does the Jag XF have that?
The lift pump has defo primed - there is pressure in the system at the fuel filter, but thee fuel pressure reading from the fuel rail (I can't read it, my mate I got over could with the X431) is way too low to be able to start or run. I can't remember what it was offhand, it reads in KPa. I'll ask him later on.
My fear is that the reluctor ring on the rear end of the crankshaft is somehow different between the Jag and the Land Rover. You can't remove it and refit it - you need to fit a new one and a special tool is required to fit the new one as well. :/
16th Feb 2015 12:29 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20731
Correct. Reluctor ring NEEDS fitted with the special tool, to ensure it is in the correct place My D3 Build Thread
Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
I know that - but I didn't touch it. I simply swapped crankshafts with it still fitted.
16th Feb 2015 4:34 pm
rich_sargie
Member Since: 08 Sep 2014
Location: hull
Posts: 43
First off I would check the cam and crank signals with a scope, to make sure they are present.
then you should be able to work out if they are In time with each other.
Secondly check the fuel pressure against spec, it could be something as simple as crossed fuel line restricting flow. So long as the engine has run authorisation good cam and crank signals and fuel pressure it will fire the injectors. Irrespective of anything else. Most ecu's don't monitor anything else until the engine is running as voltage drops caused during cranking can cause all sorts of feedback Issusees.
16th Feb 2015 7:48 pm
Ayrshore2
Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
Does anyone know if the JLR diagnostic tool lets you graph the crank and cam sensors at the same time then?
If it does, I could borrow another XF and get my mate back over with it to compare the two cars.
18th Feb 2015 10:39 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Even if SDD allows you to do this it would not be helpful and you already know that the computer is throwing a code.
You need sensor data and not computer data, hence the suggestion above to scope these signals.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 13 Apr 2014
Location: North East
Posts: 126
Are you sure the timing is correct? usually you get this fault code beause the pcm is receiving a signal from the cam sensor when it does not expect it.
18th Feb 2015 8:55 pm
Ayrshore2
Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
Yes, the timing is correct. The latest we have is a friend at a Jaguar dealer reckons the timing signal on the reluctor ring is in a different postion on the Disco crank than it is on the XF one. I've got the gearbox out, a new reluctor ring and just trying to sort out someone with the special tool to fit it in the correct position.
I managed to get the live data to read eventually (specify OBD rather than telling it which engine it is), and when it is reading a crank signal (it gives up and drops to zero after a second or so, presumably once the ECU calculates that the timing is off), the fuel pressure is fine.
As the only electrical/electronic part that has been changed since the engine was running is the reluctor ring, fingers crossed once this new one is fitted correctly and thee gearbox and exhaust refitted it will run!
10th Mar 2015 3:40 pm
snailcove
Member Since: 21 Nov 2010
Location: Aberdeenshire
Posts: 460
Be good to know the answer to this one as I have just taken delivery of a jag engine for my disco tonight .wouldn't have thought they were any different , or do people change the reluctor ring as a preventitive measure when changing there engines
10th Mar 2015 10:15 pm
Ayrshore2
Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
With the headaches it's caused so far (assumng this is what the problem is), then I would.
Does anyone know the part number for this special tool? I'm probably just going to buy the tool if I can - but Bosch Automotive's phone system is screwed and keeps cutting me off.
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11th Mar 2015 11:35 am
Ayrshore2
Member Since: 16 Feb 2015
Location: Ayrshire, Scotland
Posts: 11
It's hidden - you can't find it from inside their site, and when you do find it, there's no part number and it says "unavailable to order online - please contact customer service".
So then you phone them, and no matter which option you pick it hangs up on you. So I faxed them and a very nice Polish lady phoned back (love that accent!) but she couldn't find it either - so I eventually traced the part number (303-1130) and we discovered it's on back order.
So I'm not really any further forward - although I know the part number of the tool I need to beg/borrow now at least.
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Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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