Talbot Express 2.0 Petrol

Snelly · Eastern Rally Co-ordinator

On my motorhome, the fuel is draining ?back to the tank. I have a fuel filter and once motorhome stood for a while, the filter is dry. It then takes a few minutes to start as it pumps the fuel back into the system. Should there be a non return valve somewhere?

teckie · Last edited by teckie on Sun Mar 23, 2008 4:21 pm; edited 1 time in total

Hi.. I had a similar problem last year... my mechanic friend had a look for me think it was to do with a Non Return Valve sticking where the fuel enters the carburettor !.

Cheers

Teckie

Edited.. I remember now it wasn't a non return valve on the carburettor it was a something to do with a shut off valve !. Shows I'm not all that mechanically minded ! Embarassed

homerdog

When you say standing for a while, are we talking days or hours? Mine does the same thing, but only after 2-3 days and even then, it's only a long churn on the starter. Have you got the right filter and is there a non-return valve in the filter? H

stickey

I woould imagine the fuel lift pump is mechanically driven and will have two valves in it both of which effectively prevent fuel running back to the tank in normal use. If its a bit elderly you may either be able to get a service kit for it, a new pump, or live with it. Don't know about non return valves in the carb. could mean the float valve I suppose?
Regards,
Chris V
I'm assuming that your van is not fuel injected, with an electric pump

Snelly · Eastern Rally Co-ordinator

It is mechanical fuel pump and looks a bit manky. I recon i'll replace all the flexi fuel hose, pump and filter.

patman

I had a similar problem on a car I owned. It was the lift pump on the way out. Eventually the pump gave up the ghost and it wouldn't start at all.
Patman

gaspode · Moderator

Definitely sounds like the flap valves in the pump to me Shane, simple job to replace them. They all leak back eventually but should hold the fuel for a day or two at least. Check all the fuel line joints too.

stickey

The other problem you can get with a mechanical fuel pump is if the diaphragm is punctured, if there is a drain hole in the base of the pump fuel can dribble from here , if no hole fuel drains into the sump, we are talking old technology here though,
Chris V

Snelly · Eastern Rally Co-ordinator

Im on a mission today to get a replacement pump, filter and fuel hoses... will report back once the jobs done!

Thanks everyone for your help.

Waleem

If it were me, I would get rid of the mechanical pump and fit an electric one-the problem would then never occur again and it is not a difficult job.