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[JamesV6CDX]

Idle on LPG is now crap, it hunts all over the place, and stalls upon stopping. Even at full temp.

I'm driving around everywhere on petrol now.

The Evap is lovely and hot, and no obvious software issues. Please Help  

[Martin_1962]

Mine was not drivable until warm.

So I let it idle on gaas for about 10 minutes to thoroughly warm up.

Very cold air is denser, so try richening the mixture slightly.

What temperature is the vapour hose?

[chrisdb]

James, could you have a blocked filter?

[JamesV6CDX]

Thanks for all the replies.

The hoses are all red hot, and so is the evap.

Even when fully up to temperature, it idles really rough on gas.

Through the rev range is fine... and filter is new.

[Jay w]

when mine forst goes over to gas it does faulter a lot for about 20-30 seconds, from there is it fine.......

i would try and richen the mix slightly, try moving the whole map up a point or two and see if that helps

[JamesV6CDX]

when mine forst goes over to gas it does faulter a lot for about 20-30 seconds, from there is it fine.......

i would try and richen the mix slightly, try moving the whole map up a point or two and see if that helps

Tried that, no joy

[cem_devecioglu]

Idle on LPG is now crap, it hunts all over the place, and stalls upon stopping. Even at full temp.

I'm driving around everywhere on petrol now.

The Evap is lovely and hot, and no obvious software issues. Please Help  

the only reason coming to my mind is MAF.  because the changing parameter can only be air in the mixture,

 if one the LPG equipment parts didnt go foobar..

[JamesV6CDX]

Idle on LPG is now crap, it hunts all over the place, and stalls upon stopping. Even at full temp.

I'm driving around everywhere on petrol now.

The Evap is lovely and hot, and no obvious software issues. Please Help  

the only reason coming to my mind is MAF.  because the changing parameter can only be air in the mixture,

 if one the LPG equipment parts didnt go foobar..

That would also cause bad idle on petrol, though...

[cem_devecioglu]

old carburator systems never had problems with LPG in very cold weather (-15 Celcius ) ..I remember even the car in the morning start more easy with LPG then petrol..

As I remember we generally block the air entrance half with bandage..Can you try that ?

I think the main difference between those systems is the ECU arranging the amount of fuel injected according to air flow measured through MAF..

[Martin_1962]

Check your plugs

[JamesV6CDX]

i've done that as well, the plugs are new  

[JamesV6CDX]

Bigger/better evaporator?

[JamesV6CDX]

what effect would clamping the vac pipe have? Should I give this a go and see if idle smooths out?

[Martin_1962]

Stop it increasing output when throttle is pushed

[Kevin Wood]

What is the vapour pressure doing? If that's stable I'd say the vapouriser is OK.

Can you cut individual cylinders and see if one or two are playing up or the whole lot?

Kevin