Member Since: 22 Nov 2010
Location: london
Posts: 30
Car won't run and no revs
Hey guys, wonder if anyone can advise.
Have a Disco3 on a 55 plate.
Came out on Monday to go to work, and car turned over but when it fired it was struggling and cut out, never really started properly. To add to it it has no rev... When u put the pedal down..... Nothing.
Had it recovered to a independent LR repair centre...... TOLD ME NEW ENGINE.
Prior to this, all I had was a slight stutter on acceleration when claiming hills, and was told the EGR valves were braking down and to have them blanked off, which incerdently the car was having done today...but obviously not now.
Please if anyone has any ideas let me know!!!!!
Car had fuel but was low (20 miles left) and when AA came to recover they checked the pressure and said it was ok
If I was you, I would get taken to a proper main dealer & let them run their diagnosticsIn Spain - 2018 F Pace - Down and out's Velar
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13th Jun 2014 12:48 pm
chilliklendjian
Member Since: 22 Nov 2010
Location: london
Posts: 30
Hi Syd
Was thinking that too, but car won't run, so thought I'd check on here first
13th Jun 2014 12:59 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20869
If both EGR's have failed, they car will not take throttle.
Would be worth having them blanked first, and going from there...My D3 Build Thread
Member Since: 22 Nov 2010
Location: london
Posts: 30
Thanks Mikey
13th Jun 2014 1:09 pm
dingdongs
Member Since: 30 May 2012
Location: St. Lawrence Bay Essex
Posts: 186
Do you have fuel coming out the Schrader valve on top of the engine at the rear.Like a tyre valve.cycle ignition and depress valve with a small implement.fuel should flow with a 2"high flow roughly.
14th Jun 2014 1:38 am
chilliklendjian
Member Since: 22 Nov 2010
Location: london
Posts: 30
Hey Dingdongs
100% have fuel coming. But defo not 2" high. Maybe 5mm
U thinking air lock ?
14th Jun 2014 7:11 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Well if the AA checked the fuel pressure you should be ok. But the amount released sounds a little low (presuming the pump was running on key-turn or with engine running).
Low fuel pressure (LP side) can be the in-tank fuel pump, in-tank filter or the fuel filter itself.
You can check the current draw of the fuel pump with a multimeter if you have one. There are a few methods; these photos are on my D4:
Click image to enlarge
Click image to enlarge
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 22 Nov 2010
Location: london
Posts: 30
Hi Robbie.
The AA said the pressure was enough to start it but not high.
Had the F filter changed, with will find a mate who has a multi meter and see what readings I get.
Is your picture readings what I should achieve. ?
Thanks
14th Jun 2014 7:41 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
I don't have the specs but from my observations 10 amps is normal for D3 and D4s. I've seen a very low number on a pump with a failed impeller, a very high number on a blocked pump and nothing with a shorted pump.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 22 Nov 2010
Location: london
Posts: 30
No worries. Will see what I can do n keep u posted.
Thanks
14th Jun 2014 8:01 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
If you don't have an amp clamp hand then use the multimeter in mV range and use the voltage drop between the terminals on the back of the fuse. As the fuse is a resistor with a known (but very low) value you can use Ohm's Law to determine the current flow:
Voltage (E) = Current (I) x Resistance (R)
In the photo above I had:
Resistance of 25 Amp Fuse = 2.36mOhm or 0.00236 Ohms
Measured Voltage Drop = 0.0235v or 23.5 mV
Therefore Current Flow = 9.95763 Amps
As you can see, the numbers match the amp clamp measurement.
For those that don't like maths an on-line calc is here:
It looks more complicated than it is but is is a very convenient method of determining the current flowing in any circuit whilst simultaneously checking the integrity of the fuse.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 30 May 2012
Location: St. Lawrence Bay Essex
Posts: 186
sounds as if the pump is on its last legs.You can get a pattern one off advanced factors for about £40.Idone a write up on how to drop the tank if diy but a couple of good axle stands and a trolley jack is a must to support the tank to bring it down in stages.
had the car been difficult to run prior to this fault maybe struggling to get to 20mph or so?no pull away etc.Allow a god afternoon if its a diy pump fitting
14th Jun 2014 8:33 am
lrserviceandrepair Site Sponsor
Member Since: 20 Sep 2012
Location: York YO19 6QL
Posts: 136
Disco_Mikey wrote:
If both EGR's have failed, they car will not take throttle.
Would be worth having them blanked first, and going from there...
2nd what Mikey says I once too had a D3 which would not start, turned out to be both EGR valves stuck open.
Ask them to check live data on EGR position also to check to see what KPA pressure is on high pressure fuel pump when cranked over. If KPA on high pressure fuel pump is too low due to lack of fuel from in the tank pump the Ecu will not pulse the diesel injectors.EGR blank 07 onwards & remap
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14th Jun 2014 2:04 pm
robbo770
Member Since: 29 Jan 2013
Location: Aberdeenshire
Posts: 2294
try the cheapest option, put in £5 of fuel via a fuel can FFRR SC 4.2
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