Help please for a 90 Turbo Diesel

Hi all

I have a 1990 90TD and I am encountering the following problem.

When I drive at speeds in excess of about 45mph for more than a few minutes
(ie speeds when the turbo should be in operation) the car loses all power
and comes to a halt with the engine giving up entirely, I solve this by
undoing the fuel filler cap when pops off like a morter bomb leaving what
fuel is visible bubbling like lemonade. The vehicle runs fine after this.
This is becoming a real pain for all but the very shortest or slowest
journeys. I was told before that there could be a leak in the diaphagm in
the plenum chamber (whatever that is) but it occurs to me that instead of
the turbo charging the mixture it is charging the fuel tank instead. I've
unblocked the breather tube to the tank and bought a new filler cap (which
according the landrover is only vented on the way in anyway). The pressure
is building up inside the tank and not creating a vacuum as should be the
case.As i can only go a few miles it is hard to tell but it doesn't seem
like the turbo is working on the engine either.

Any help would be greatly appreciated. Thanks

In article <[email protected]>, Mark Cable
<[email protected]> writes
>
>Hi all
>
>I have a 1990 90TD and I am encountering the following problem.
>
>When I drive at speeds in excess of about 45mph for more than a few minutes
>(ie speeds when the turbo should be in operation) the car loses all power
>and comes to a halt with the engine giving up entirely, I solve this by
>undoing the fuel filler cap when pops off like a morter bomb leaving what
>fuel is visible bubbling like lemonade. The vehicle runs fine after this.
>This is becoming a real pain for all but the very shortest or slowest
>journeys. I was told before that there could be a leak in the diaphagm in
>the plenum chamber (whatever that is) but it occurs to me that instead of
>the turbo charging the mixture it is charging the fuel tank instead. I've
>unblocked the breather tube to the tank and bought a new filler cap (which
>according the landrover is only vented on the way in anyway). The pressure
>is building up inside the tank and not creating a vacuum as should be the
>case.As i can only go a few miles it is hard to tell but it doesn't seem
>like the turbo is working on the engine either.
>
> Any help would be greatly appreciated. Thanks
>
>

Hi

On the top of the injection pump is a diaphragm that monitors the turbo
boost pressure and alters the fueling to suit.

This diaphragm is split causing the turbo to pressurise the fuel tank.
this can also cause the engine to race out of control too.

A simple job to sort out.

Hope this helps.

--
Marc Draper

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