Fuel icing

[tidgy25]

Hi everyone,


I am the proud owner of a 1983 t25 2.0 Aircooled which i got on Saturday, i took it for its first run and it started running really badly but still run just. i had to call the AA out because it had a flat battery i mentioned the poor running and the aa guy looked at it and said its fuel icing. Whoever has had it before has fitted new carbs to it with fast road filters and he is saying they run to cool. Has anyone had this issue before and if so can it be rectified?. Your help would be appreciated a bazillion.

regards

Kristian

ps hi and im glad to be finally part of the VW crew.

[jason k]

single central carb perchance?

[tidgy25]

Hi,

Thanks for coming bacl to me its a double carb with a steel rod running between them both, any help would be greatly appreciated.

[jason k]

Ok if its stock carbs then put a wanted ad up for a airbox and that should sort you out.

[California Dreamin]

Whilst I understand icing can happen, surely it is not cold enough to occur at this time of year? I know fast moving air excentuates the risk but you still need to be a few degrees above freezing for this to happen.

Martin

[tidgy25]

They dont look like stock carbs how would i be able to tell what they are?.

[T25Convert]

Hi,

Post a pic of them - someone on here will be able to say waht you have!

Its pretty easy to find out if it is icing that is causing the problem (Like California Dreamin ^^^ I expect that this is unlikley unless you live somewhere really cold and damp!)

Open up the engine bay, start it up and let it run at about 1/4 throttle until it runs rough. Run round to the back (or have a handy assistant ready round there!)

If it is icing you will be able to see it forminig at the base of the carbs - it forms inside constricting the throat, but will form condenstation / ice on the outside too...

If it is carb icing it should clear reasonably quickly as the engine warms up.

If you started the van up and it ran fine (or fine ish) then after about 5 - 10 minutes it staretd to run rough and continued to run rough at idle / low throtle there is a higher chance at this time of year that you have an air leak. With the van cold the choke(s) come on which masks the air leak. Choke goes off, van runs lean and sounds really rough.

Cheers,

Alex

[sarran1955]

Hello,

They'll be webers...

As usual...

Fit a 12volt heater blanket onto the inlet manifold,

Cordialement,

[tidgy25]

Thanks everyone i am going to have a good look at it this weekend and keep my fingers crossed its an air leak.