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landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by simon pitts <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1014' width='330' height='300' border=0 style='border:none;'> on November 28, 2008, 11:02 am

had this vehicle in with mil light on
po301 misfire at cylinder 1
replaced plugs and coils and leads and extensions
still pops up with po301 and misfires totally at random when this happens
this vehicle is gas converted but this fault happens on lpg and petrol
ne1 av ne ideas

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by Andrew West <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5350' width='330' height='300' border=0 style='border:none;'> on November 28, 2008, 10:59 pm, in reply to "landrover freelander 2.5 v6 petrol x reg 2000 misfire"
Andrew West

Hello Simon,
It could be a problem with the lpg emulator wiring.It may be worth taking the plugs off the lpg side of the emulator wiring & reconnect the petrol injector plugs as originally fitted. Could also be a sticky valve issue on cylinder one or possible head gasket problem.Are the compressions & vacuum readings ok?
Regards, Andrew

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by Aidan <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on November 29, 2008, 8:08 am, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"
Aiden Birley

Hi

How long has it been on Gas, some engines still have problems with valve seat recession and damage with gas.

In my experience Gas will almost always cause misfire codes at some point, but as you say have said it still has a problem on petrol so must be an issue.

Cheers Aidan

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by simon pitts <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1014' width='330' height='300' border=0 style='border:none;'> on November 29, 2008, 6:47 pm, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"

will check compressions and let know
headgasket already checked out ok
still waiting for o.e coils to arrive as has intermotor on at the moment

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by Shaun Dale <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2719' width='330' height='300' border=0 style='border:none;'> on November 29, 2008, 10:18 pm, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"
Shaun Dale

Hi,
I agree with Andrew on this, check the emulator for the petrol injectors. If the ECM detects an injector fault it can cut the cylinder out completely, resulting in a misfire on LPG as well as petrol. Got caught out on a dual fuel Vectra for a dry joint in the emulator, twenty minutes with a soldering iron (including removal and replacement)and she was as sweet as a nut.
Shaun

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by simon pitts <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1014' width='330' height='300' border=0 style='border:none;'> on November 30, 2008, 5:54 pm, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"

WHAT IS THE EMULATOR EXACTLY NOT TOO FAMILIAR WITH LPG CONVERSIONS OTHER THAN RUN HOTTER AND EAT PLUGS QUICKER.
IT IS A MULTI POINT INJECTION LPG KIT NOT SINGLE POINT.

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by aidan <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on November 30, 2008, 6:58 pm, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"
Aiden Birley

hi

the EMULATOR is wired between the ECU and injector, when on gas turns injector off but simulates the injector so the ECU dos not log as a fault. when on petrol switches the injector back on

Other will be able to give moor in depth info I am sure

Cheers Aidan

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by Shaun Dale <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2719' width='330' height='300' border=0 style='border:none;'> on December 1, 2008, 9:43 am, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"

On the Vectra system (the only one I have had dealings with)the emulator was just a box with a couple of relays and some load resistors in. When the vehicle switches to gas, the gas ECU literally turns off the petrol injectors by switching over the relays but to avoid injector codes being set in the petrol ECU the same relays switch in a set of dummy load resistors. i.e.the petrol ECU still thinks it iscontrolling the fuelling but in reality it is doing nothing.

Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire

Posted by Andrew West <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5350' width='330' height='300' border=0 style='border:none;'> on December 4, 2008, 7:18 pm, in reply to "Re: landrover freelander 2.5 v6 petrol x reg 2000 misfire"
Andrew West

Hello Simon,
depending on what make of system you have got, it probably has the emulators built into the lpg ecu seeing as it is multipoint.
If it's a Prins system then it should have seperate emulators, but most others are internal to the ecu.The easiest way ,although it is still a pain on these engines, is to remove the lpg cut harness connectors & put the petrol injector connections back as they were originally. You may find though that it doesn't have the cut harnesses & may just be wired into the switch side of each injector.
Hope this helps, regards,Andrew

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