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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridge
Posts: 426

United Kingdom 2002 Range Rover Vogue 4.4 V8 Epsom Green
Shaking and flashing engine light...

Hi All,

I am getting very poor very quickly... and losing a lot of hair fast...

For around 3 weeks the lpg on my car has not been working right... it started off with what seemed like a vibration from the rear... I thought it was the TC on its way out and although annoyed just drove for a few days...

We then had the engine light flashing (not staying on) and they car ran very very lumpy... You could drive through it (the wife was in it she told me she just carried on) and it went ok. I then have been driving on petrol for the last 2 weeks until my lpg man could take a look.

Well the problem seemed a lot worse... when you switched at idle it now just dies slowly.

We tried switching off every injector for diagnostics and having it on 'lpg' it ran fine (all injectors on petrol) however switching any one injector to LPG we tried all Cool it starting to run really rough not enough to kill it but it wasn't right.

It has had a new Ecu in the last 8months and injectors and pipework as it was all getting brittle. The only thing that wasn't new was the vaporiser. We just changed that and its still the same and I'm not too impressed Sad

Any ideas what could be my gremlin?

Oh and we tried recalibrating but it wouldn't even do that without dying. Current stable:
2002 4.4 V8 FF
2006 BMW M6

Post #449692 1st Sep 2017 5:57pm
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ohuntsman



Member Since: 21 Mar 2016
Location: Surrey
Posts: 113

United Kingdom 2002 Range Rover Vogue 4.4 V8 Zambezi Silver

Has it run empty? If you run out of gas you can get all the S*** clogging everything up.

Post #449704 1st Sep 2017 7:58pm
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridge
Posts: 426

United Kingdom 2002 Range Rover Vogue 4.4 V8 Epsom Green

nope not at all it had 1/2 a tank and I filled her up elsewhere also filters changed... Current stable:
2002 4.4 V8 FF
2006 BMW M6

Post #449705 1st Sep 2017 7:59pm
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ohuntsman



Member Since: 21 Mar 2016
Location: Surrey
Posts: 113

United Kingdom 2002 Range Rover Vogue 4.4 V8 Zambezi Silver

How fresh are the spark plugs, coilpacks, ht leads? LPG is harder to ignite than petrol.

Post #449706 1st Sep 2017 8:04pm
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridge
Posts: 426

United Kingdom 2002 Range Rover Vogue 4.4 V8 Epsom Green

Plugs are under 10k - no ht leads as they have coils straight on them which work fine - I'd get it for these components if it was a couple but not all and not just suddenly rather than slowly degrading... Current stable:
2002 4.4 V8 FF
2006 BMW M6

Post #449730 1st Sep 2017 11:28pm
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Lukie



Member Since: 27 Sep 2016
Location: Liverpool
Posts: 411

2002 Range Rover Vogue 4.4 V8 Zambezi Silver

If the car runs fine on petrol best thing to do would be get the LPG ecu hooked up see what faults it has seen

Post #449942 5th Sep 2017 8:39am
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Dolphinboy



Member Since: 08 Dec 2009
Location: SW
Posts: 1644

United Kingdom 2004 Range Rover Autobiography 4.4 V8 Epsom Green

LPG Filter? these need changing regularly and start to fill with a white liquid (like tippex) if not changed every 200 hrs or yearly.

Post #449949 5th Sep 2017 11:31am
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridge
Posts: 426

United Kingdom 2002 Range Rover Vogue 4.4 V8 Epsom Green

That was changed when we did the piping so that's ok - interesting you say that - in my m6 I did 40000 miles on one changed it cut it open and it still looked near new... Current stable:
2002 4.4 V8 FF
2006 BMW M6

Post #449952 5th Sep 2017 11:46am
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Jonno



Member Since: 08 Jun 2011
Location: Eastnor HR8
Posts: 190

United Kingdom 2012 Range Rover Autobiography 5.0 SC V8 Causeway Grey

The front O2 sensors would be a good place to start. sounds like the engine is running too rich on lpg. Then remap the lpg ecu. The fuel trims are too far out for the car to run properly on Lpg and although the car proberbly runs ok on petrol your Mpg is pants 5.0 supercharged autobiography
Gone-4.4 Vogue Lpg now unmapped
4.6 HSET Turbo Lpg mapped
Gone-Defender 90 200tdi
Gone - 3.9 Sprintex supercharged LPG
Gone - 3.9 Vogue LPG

Post #450002 6th Sep 2017 6:34am
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridge
Posts: 426

United Kingdom 2002 Range Rover Vogue 4.4 V8 Epsom Green

It's actually running lean all the faults it throws when on gas say lean bank 1 , 2 etc. Not getting any o2 sensor faults though except one rear o2 heater which has been like it since I had it and it ran fine as I think that's just for emissions Current stable:
2002 4.4 V8 FF
2006 BMW M6

Post #450006 6th Sep 2017 7:28am
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Jonno



Member Since: 08 Jun 2011
Location: Eastnor HR8
Posts: 190

United Kingdom 2012 Range Rover Autobiography 5.0 SC V8 Causeway Grey

Then it stands to reason that your fuel map is incorrect on the lpg ecu.
just remap it. 5.0 supercharged autobiography
Gone-4.4 Vogue Lpg now unmapped
4.6 HSET Turbo Lpg mapped
Gone-Defender 90 200tdi
Gone - 3.9 Sprintex supercharged LPG
Gone - 3.9 Vogue LPG

Post #450008 6th Sep 2017 8:02am
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dingg1



Member Since: 29 Jun 2013
Location: NEWCASTLE
Posts: 379

2007 Range Rover Vogue SE 4.2 SC V8 Stornoway Grey

You say you've changed the reducer , have you set it up to exactly the same pressure , as above sounds like it needs calibrating to me , can be a long job to get right if you don't know what you're doing

Post #450017 6th Sep 2017 8:58am
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