Member Since: 28 May 2014
Location: Belfast
Posts: 496
V8 on LPG - List of faults and Engine fault message [Merged]
Hi all, a problem with a number of systems has just raised its ugly head. On Friday after leaving work I was stopped at lights at the carpark exit when the MIL light came on and a message saying Engine fault showed in the message centre.
When I moved off I found that I could not accelerate above a few MPH and there was no kick-down. At the next set of lights (300m) I had time to switch off and restart and all was ok. I was heading to B&Q and when I left there the same thing happened again.
Today I connected up My Nanocom Evo and down loaded the fault codes, of which there were some 37. To see which were presently valid I cleared them then drove around the block and read them again. They were back and the car needed a restart to run properly.
Just been out again on a short drive for a message, car ran OK, but on restarting for the return wouldn't run properly no lights or messages but no kick-down and acceleration limited to gradual pickup.
The brake switch is a new on just fitted to replace one that was only 2 months old. New spark plugs fitted 4 weeks ago other than that and all no other engine or gearbox work done.
I have included a list of all the faults saved from Nanocom and any help would be appreciated thanks,
ECU: Instrument Pack
FAULT 1 OF 37
CODE:U0010 Medium speed CAN communication bus (PENDING)
FAULT 2 OF 37
CODE:U0001 High speed CAN communication bus (INTERMITTENT)
FAULT 3 OF 37
CODE:U0010 Medium speed CAN communication bus (PENDING)
FAULT 4 OF 37
CODE:U0151 Lost communication with restraints control module (PENDING)
FAULT 5 OF 37
CODE:U0138 Lost communication with all terrain control module (PENDING)
ECU: Engine Management
FAULT 6 OF 37
CODE:P0301 Cylinder 1 misfire detected
FAULT 7 OF 37
CODE:P0306 Cylinder 6 misfire detected
FAULT 8 OF 37
CODE:P0308 Cylinder 8 misfire detected
FAULT 9 OF 37
CODE:P0300 Random misfire detected
FAULT 10 OF 37
CODE:P0316 Misfire detected on start-up (first 1000 revolutions)
FAULT 11 OF 37
CODE:P0301 Cylinder 1 misfire detected (PENDING)
FAULT 12 OF 37
CODE:P0306 Cylinder 6 misfire detected (PENDING)
FAULT 13 OF 37
CODE:P0308 Cylinder 8 misfire detected (PENDING)
FAULT 14 OF 37
CODE:P0300 Random misfire detected (PENDING)
FAULT 15 OF 37
CODE:P0316 Misfire detected on start-up (first 1000 revolutions) (PENDING)
FAULT 16 OF 37
CODE:P0301 Cylinder 1 misfire detected(HISTORIC)
FAULT 17 OF 37
CODE:P0306 Cylinder 6 misfire detected (HISTORIC)
FAULT 18 OF 37
CODE:P0308 Cylinder 8 misfire detected (HISTORIC)
FAULT 19 OF 37
CODE:P0300 Random misfire detected (HISTORIC)
FAULT 20 OF 37
CODE:P0316 Misfire detected on start-up (first 1000 revolutions) (HISTORIC)
ECU: Transfer Case
FAULT 21 OF 37
CODE:U0155 Lost communication with instrument cluster control module (INTERMITTENT)
ECU: Automatic Gearbox
FAULT 22 OF 37
CODE:U0155 Lost communication with instrument cluster control module
I'll have to leave the misfire faults to the experts but, as you have a lot of U codes there, how's your battery?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
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
15th Mar 2015 6:02 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
Based on the symptoms I would look at the live data for O2 sensors and check the short term and long term fuel trim readings when operating in closed-loop, increasing short term fuel trim with a low reading from the oxygen sensor would point towards a lean condition. A random misfire code can indicate a lean condition due to unmetered air entering the system, the vacuum leak would be more prominent at idle.
A visual inspection of the ignition circuit and its connections would be advisable.GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
15th Mar 2015 6:20 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Battery would appear to be fine, 12.16V with everything off and with engine running in excess of 15V.
Just completed a Hard Reset to little effect, but what I have noticed is that the problems may be related to running on LPG, can't be sure but after the Hard Reset it was set to LPG and Engine System Faulty message came up. Cleared faults and restarted on petrol and everything seemed ok, no engine faults showing.
Looks like I will have to have the LPG system looked at.
15th Mar 2015 9:25 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
As the fault appears to be present when running on LPG, and a lean condition misfire caused by a vacuum leak would be present on both LPG and petrol, it would be appropriate to focus on LPG system in this case. You can still perform basic electrical tests on the LPG injector wiring but diagnostics are likely to require specialised test equipment.GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
15th Mar 2015 10:21 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
First symptoms of VSR?Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Thanks for that Robbie, just what I needed to hear . Was thinking along those lines myself, but a second opinion always helpful even when the answer's not what you want to hear. The car is 10 yrs old and has been on LPG all that time so VSR very likely.
Looks like I'll be having the valve covers off and checking the gaps, then, in the short term, reset the tappets with a view to having the heads reworked latter when I've saved enough. But taking redundancy in 2 months so may have to leave it for a while.
16th Mar 2015 12:10 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
I'm not sure if there would be any adjustment in the tappets as the engine uses a DOHC layout with hydraulic valve lifters that are self adjusting GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
16th Mar 2015 12:32 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Fortunately the V8s have a different layout from the Diesel engines. Each cylinder head incorporates dual overhead camshafts operating four valves per cylinder via solid shimless aluminium alloy valve lifters. There is a small range of lifters available to allow for gap adjustment.
So much in the same way that early petrol engines could have their tappets done, all be it more easily with screw adjustments, the Disco 3 4.4 V8s tappets can also be done by fitting different size tappets. But it will be just a matter of time before a full head off will be necessary.
16th Mar 2015 1:14 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
The workshop manual details the camshaft and valve arrangement but didn't show anything relating to tappet sizes
It would be worthwhile performing a compression test on all cylinders and if necessary a cylinder leak down test before going to the trouble of stripping down the top end. If the valves are failing to fully seal you would expect to see the effects on the compression tests.GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
Battery would appear to be fine, 12.16V with everything off and with engine running in excess of 15V.
Obviously a minor point compared with the engine issues, but that's not so great. Don't let it go much lower than that. 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
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
16th Mar 2015 3:37 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
This is an extract from the manual for the D3 4.4l V8. As you can see the set up is very like that of early petrol engines but the adjustment is by fitting selected tappets from 50 available ranging from 2.95mm to 3.685mm in increments of .015mm. They sit in the recess for the valve and on top of the valve stem with the skirt shrouding the valve spring.
The photos shows what the tappets look like.
Item Part Number Description
1 - Camshaft bearing cap
2 - Tappet (shimless)
3 - Collet
4 - Valve spring cap
5 - Valve spring
6 - Valve stem oil seal
7 - Valve
8 - Inlet camshaft
9 - Exhaust camshaft
Lost for Words wrote:
Alphamale wrote:
Battery would appear to be fine, 12.16V with everything off and with engine running in excess of 15V.
Obviously a minor point compared with the engine issues, but that's not so great. Don't let it go much lower than that.
Thanks for that, i'll keep an eye on it.
16th Mar 2015 9:06 pm
Mogwyth
Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976
Alphamale wrote:
Thanks for that Robbie, just what I needed to hear . Was thinking along those lines myself, but a second opinion always helpful even when the answer's not what you want to hear. The car is 10 yrs old and has been on LPG all that time so VSR very likely.
Looks like I'll be having the valve covers off and checking the gaps, then, in the short term, reset the tappets with a view to having the heads reworked latter when I've saved enough. But taking redundancy in 2 months so may have to leave it for a while.
Mine had to have new heads just before I brought, it had done around 80,000 miles on LPG and was suffering from multiple misfires like yours.The independent who did the work claimed the heads were beyond redemption.
Bill==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
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Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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