Re: 110 fuel problems - still
In message <joi1f.71965$iW5.firstname.lastname@example.org>, Peter
Sheppard <email@example.com> writes
>110 Defender CSW 1990 2.5l diesel (just pre 200TDi)
>This should be simple - but as ever it aint!
>I have a problem that with the fuel cap fitted (it is the correct one I
>have checked) I get excessive pressure in the fuel tank and the effect
>of fuel starvation on the engine after a period of running at
>As a first test I removed fuel cap and the fuel starvation problem went
>I then made my fuel cap "vented" by drilling a hole in it! This is
>also fine except just after when I have filled up the tank and the
>diesel spurts out the hole.
>It is a Landrover fuel tank. There is a drain plug, a take off to the
>lift pump, the filler neck and a breather in parallel (although this
>breather is attached below the fuel cap) so it can't "breathe" with the
>fuel cap fitted (I assume it's just there for when you are filling with
>Any suggestion as to what is happening? As this is positive pressure
>it means that a significant amount of either fuel (or air) is being
>returned to the tank. Is this a symptom of a failing injector pump? I
>know that I have a leaky injector (as I get a lot of smoke and rough
>running on idle) could this be a factor?
>Can you suggest any fuel injection experts in the Wiltshire area
>(Trowbridge to be precise)
Is it a turbo ?
If so it will be a split in the turbo boost diaphragm on the top if the
injection pump. This is allowing boost, created by the turbo, to
pressurise your fuel tank.
I have seen engines rev out of control with this problem too.