Focus Starting Glitch

In message , andy writes

Perhaps its losing fuel pressure in the line from the pump overnight?

Genuine plugs and leads? Plugs gapped to 1mm, rather that the 1.3mm they are sometimes supplied with?

Chris

thinking about this, don't car have electric fuel pumps in the tank these days ? Perhaps air gets in the line ?

Thanks for replies - my thinking is towards fuel related It fires first time but you need to rev engine straight away or it dies...... There is a hissing noise from left rear of engine ( looking from front ) so could be something to do with a vacuem leak in hose possibly ? Anyone experienced this ?

should say evident when ignition is switched off !

there should not be a hiss. some fords have vacuum operated heater flaps, any leak in those will give a hiss and yes that could well cause your starting fault.

But not the Focus, AFAIK.

Chris

if there is a vacuum leak it might cause an audible hiss, if so it will probably be remote from the engine (or it would stop instantly) so have a good look for any vacuum pipes off the inlet manifold, there is usually one that goes to a bit of gubbins on the firewall at the back of the engine bay

I have read all the replies. I did not see Idle Control Valve suggested so I will throw it in the mix. I seem to recall similar symptoms on my Focus 1.8LX, culminating months later in not being able to idle at all.

HTH,

Nobody mentioned it because it didn't fit those particular symptoms i.e. starts then cuts out then starts again and is fine for the rest of the day.