Clio 1.5 diesel van stood for weeks will not start just turns over a little bit then jams whats the fault???

The fuel pump may be starting to go bad, when you get below half a tank, the pump does not submerge in fuel as much to keep it cool and it will seize up and stall the motor. You will need to replace the pump and check inside the bottom of the tank for small metal bits that almost look like shiny sand.

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for Manual Valve replace. Thanks

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Is it a petrol or diesel van, you don't say which? What make and model is it?

change the oil and filter first if you can turn the motor by hand to make sure its not siezed. pull the plugs and put a little diesel in them put plugs back in . make sure your battery is good and crankit it a little to the oil moving through out the engine

Check for water separator and change fuel filters. You should drain water separators daily.

the heading is diesel glow plug relay and then you go on about a choke and petrol inplug holes
what have you got a diesel engine or a petrol engine

Have fuel pressure checked and scan the system for fault codes.

I loved your description - I knew exactly the thing you were talking about! My manual says that it is a warning light for "Heater plugs on" (if you have a diesel) and electronic fault (diesel or petrol). If this thing comes on while you are driving, you should really get it seen to as soon as possible. Sorry I can't say what the electronic fault is, but not possible without being able to inspect it physically.

If you have a diesel car, this thing should come on when you turn the ignition key to position M. If you wait a while it should go off to show that the heater plugs are hot enough for you to start the engine.

All the best!

black smoke is not enough air or excessive fuel
if turbo , the turbo is not working and boosting, injector failure
incorrect fuel in system ( petrol instead of diesel)
water in fuel will damage injector tips

This sounds like a problem in the fuel shut off circuit. When you turn the key on, it energizes the fuel shut off solenoid on the injection pump. When you turn off the key, power is removed and the pump is moved by spring to the fuel off position. Check for power at this terminal when you are having a problem, ( with the key on) If no power then I would check the wiring and connectors from this connection to the Ignition key. I believe it is wired direct. That can be checked at http://www.alldata.com/products/index.jsp

subscribe3 and get a wiring schematic for the car and see if it is wired direct to the ign switch of from a relay, I am sure it is a connection problem if you have no power.

A 1.7 diesel even if turboed, is dead slow in any vehicle let alone a van. Enjoy the fuel economy

good luck