Vehicle & Technical > Range Rover
MPG on LPG
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First place i'd look for an overfuelling problem is the o2 sensor, provided it's a closed loop system. Injection is slightly better for economy and power but not massively as some people belive but still a definite improvment. but not worth the extra cost on vehicles made before 97.
RRB when I change my oil after 5000miles it comes out only slightly darker than when it went in, that's how little soot lpg produces 8)
Yoshi:
This is the picture of the engine:
barnhill4x4:
Your biggest problem is that airfilter, LPG Single point systems do not like ram air one little bit, they run better with a little restriction in the air intake.
I just fitted a snorkle on mine and have to have the inlet facing back or the car will stall, even with it facing back, in high winds the car will stall on tickover.
Put the standard airbox back on, I am sure you will notice a difference.
Range Rover Blues:
Can we differetniate between single point systems and draw-through systems.
That one pictured just above is a draw through, it relies on the draught within the inlet and therefore the vacuum at the gas ring to regulate the mixture, one of the reasons the regulator (reducer, vapouriser etc) is so big.
A sibgle point sytem would cope better with the 'ram air' effect becuse it uses a feedback loop from the lambda sensor to regulate the fuel mixture, these are definitely better than draw through but still limited, they also still 'choke' the engine because of the shape of the gas ring.
A single point system should offer a good balance of economy and power, but will never be as good as a multi-point for power. If I was worried about economy I wouldn't drive a 5.0l v8 though, would I?
Yoshi:
Ok could someone put this in the english language and possibly tell me where i am going wrong and/or how to maybe rectify it!
Cheers :D
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