how do i know?

[lyndbo]

how do i know if the primer pump is going?
on my previous 2.3 you could pump it but then it would get harder
on my 2.8 you can pump and pump and it wouldn't get hard.
which one sounds like its working????

[The Engineer]

they all get hard to pump if they are working ok sounds like the pump diaphram is stuffed

[lyndbo]

is it best to get a new prime pump or the diaphram?

[Drift]

My pump presserer in thing only shows slightly more resistance when pumped, but the old girl runs like a dream so Im leaving it alone

[lyndbo]

you see mine is running dia,only getting upto 2500-3000rpm,and it starts to lose slight power.

[Drift]

Thats it then as he said, its knackerd

[Trugga]

Surely, the primer pump is only used to bleed the air out of the fuel having changed the fuel filter (or having run out of fuel)

Lawrence

[Drift]

If the diaphragm is split or torn it will allow air in.

[willowkevin]

apologies if im wrong , but doesn't the pump bit go downwards when knackered ? like up n down whilst you rev ? i dont think the fact that it doesn't go hard indicates primer pump failure , i think thats the diaphram "vaccuming" as the fuel cant flow with the stop solonoid switched off !

[markta]

i know this has got nowt to do with a prime pump but are you sure thats the problem as if its only revving between 2500-3000 rpm it sounds to me that its more likley that the pipe to your turbo is either loose or has a split etc in it,as this would make it lose power & stop it revving.as trugga said the primer pump is for bleeding the air out after filter change etc etc
i,ve said this before,i dont even use the primer pump,it is much easyier to cut the fuel line from the filter to the pump & insert a hand pump,so if you ran out of derv or after a filter change 2-3 pumps sorts it & engine fires as it should........