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Old 1 Week Ago   #1
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Petrol to LPG switch problem

When the engine switches automatically on my 2009 Panda 1.2 Natural Power from petrol to gas the motor hesitates and loses power. With petrol the car goes fine.
I took the car to a gas specialist and they told me it needs 3 new injectors and a new gas filter. They have quoted 400pounds for the work that seems a lot for what looks like changing easily accessible components.
They told me the problem was caused by dirty gas. Is it possible to clean the injectors?
Thanks for any advice.
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Old 1 Week Ago   #2
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Re: Petrol to LPG switch problem

I know little about gas systems but cleaning the injectors (or even replacing) cant be hard to do.

Try calling http://tinleytech.co.uk for information and parts.
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Old 1 Week Ago   #3
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Re: Petrol to LPG switch problem

Ive been thinking about going to LPG on our 1.2 Panda. As the engine is only about adequate for power I've been put off (LPG can reduce power) and it's not exactly a wallet basher at the petrol pumps.

However, your issue got me thinking. Liquid phase injection systems have been off the charts for price and hassle to fit but prices have fallen considerably. If yours really does need costly repair work you might want to consider this.

LPG is normally gasified outside the engine so less air can be drawn into the engine. Result less power. No biggie on a 200+ HP Range Rover but an issue for a 1.2 Panda. Liquid injection solves the volumetric problem as it cools the intake air. Dense air has more oxygen so more power is possible. A great idea for small engines. It's also easier (they say) to regulate the fuel flow.

http://www.lpgshop.co.uk/4cyl-vialle...injection-kit/
http://tinleytech.co.uk/shop/lpg-kit...injection-kit/
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Last edited by DaveMcT; 1 Week Ago at 13:06.
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Old 1 Week Ago   #4
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Re: Petrol to LPG switch problem

Not got a LPG or worked on one.

But the diagnostics sounds strange to me.

Works fine on petrol but not on LPG = 3 injectors and gas filter

Rarely does two unconnected parts fail together ?

Rarely does a fiat petrol injector fail let alone 3 ?
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Old 1 Week Ago   #5
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Re: Petrol to LPG switch problem

I suspect the issue is with the gas filter which is either clogged (so gas injectors may be ok) or its clogged and holed so gas injectors are dirty.

Depending how well installed the original system was (and how well it drives when working) you might want to think of an upgrade.
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Old 1 Week Ago   #6
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Re: Petrol to LPG switch problem

Thanks for all your replies.
I have been servicing the car myself and I have not owned an LPG car before. I hadn't thought about changing the gas filter. I just assumed that LPG was clean. I know now that the gas filter has to be changed quite regualarly. May be the gas filter failed and damaged the injectors as you suggest in your last post Dave.
I don't really notice much of a power drop when it switches to gas but I wouldn't describe it as sporty. It is impressively economical and in Italy where I live there are plenty of LPG stations.
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Old 1 Week Ago   #7
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Re: Petrol to LPG switch problem

I do a regular commute of 35 miles each way currently on a motorbike most of the time (wife uses Panda for school runs etc). But I plan on getting another Panda. Autogas is available around here so I will probably fit a gas system. The costs savings are not massive (its not using much fuel anyway), but seeing the prices of liquid gas injection systems I may well go that way.

12,000 miles at 10 miles per litre = 1500 in posh petrol costs. It's effectively cost neutral and does help on M-ways. At a 50% fuel cost saving the LPG would repay it's costs in 2 years but I like the idea of doing it. The repayment period would be shorter if I get a 100HP.

I read that "Flashlube" is a good idea on LPG cars to protect the engine valves. I have no idea how important it really is
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Last edited by DaveMcT; 1 Week Ago at 12:28.
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Old 1 Week Ago   #8
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Re: Petrol to LPG switch problem

You could try this.

http://www.avantimepassion.fr/node/38



Chrome translates it quite well.



Also read and clear all codes. At least one person had bad the LPG run badly due to a logged code. Clearing the code did fix it temperately before it came back.
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