'89 240 b230k fuel problem?

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keith Barret - 09 Mar 2006 14:56 GMT

Can anyone help with this?

'89 240 b230k in the uk with 184.xxx miles.

Over the past few months had the following problems.

Occasionally when stuck in traffic, idle speed drops and will stall, if
allowed. usually recovers when speed builds up.

However, twice when on motorway at around 70 mph engine seems to loose
power and will eventually stop. Seems like a fuel issue as becomes
jirky and gradually dies. In the past, it has started immediately and
may run for days without trouble.

Today, when trying to start it, lots of blueish smoke from tailpipe.

After cranking for a while, it did not start. However, after about 2
minutes, it started immediately and did another 60 miles without
problem.

I feel that the mechanic is not going to find this as it can run without
problems for weeks. Having said this, I am getting tothe point of
thinking that one day, it will not start again.

I have the solex unit.

Anyone any ideas on this?

Thanks

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Allen - 09 Mar 2006 15:38 GMT

> Can anyone help with this?
>
[quoted text clipped - 25 lines]
>
> Thanks

If this car has a carburetor you are probably getting carb ice. The
pressure reduction of the air passing through the venturi has a cooling
effect, as does the vaporization of the added fuel. Moisture in the air
will freeze in the venturi, eventually closing it enough that the engine
will stall. After stalling the heat of the engine melts the ice and it will
start again. Is the heat riser from the exhaust shroud to the air intake
intact? Is the regulator door opening and closing?

Allen

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keith Barret - 09 Mar 2006 16:32 GMT

> If this car has a carburetor you are probably getting carb ice. The
> pressure reduction of the air passing through the venturi has a cooling
[quoted text clipped - 5 lines]
>
> Allen

Thanks for your thoughts, Alan.

The shroud from the exhaust seems to be connected. As far as anything
else is concerned, I have not been able to check much as I did not wish
to hang around on the motorway.

What about the smoke from the tail pipe? and also, if it was icing,
would it not happen more often? Weather has been mild today but a week
ago it was below freezing and it never played up then.

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Allen - 09 Mar 2006 16:51 GMT

> Thanks for your thoughts, Alan.
>
[quoted text clipped - 5 lines]
> would it not happen more often? Weather has been mild today but a week
> ago it was below freezing and it never played up then.

I don't know about the smoke other than the fact that if it appears after
the stall from icing there will be a slug of water going through. Also the
icing only occurs during certain atmospheric conditions. The amout of
moisture in the air and the temperature range. If it is below freezing then
there is not much water vapor in the air. I've seen it as high as 60-70
degrees F also.

allen

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