Car won't start, any pointers?

[Drumster]

I drove the car yesterday and on the 4 occasions it needed to start it did so without any issues. Today, engine turns over but won't fire. It's a 2l Zetec on TBs. No inertia switch fitted.

Turn battery master switch on, ignition on and deactivate immobiliser and can hear fuel pump priming, press the starter button and engine turns over sweetly enough but won't fire. Battery is showing over 13v and about 11.3 when cranking and there is over 1/2 tank of fuel.

The only odd thing (perhaps) is that I can hear a clicking under the dash when trying to start, I guess this is the problem? Likely causes anyone? 

[Hampshire West AR]

Is it a Toad Sterling Excel immobiliser fitted Chris?  I think one of the two immobilised circuits is the starter motor and it's turning over and the other is a live feed from the ignition to the fuel pump so it sounds like that is ok? Might be worth removing the scuttle and checking were the clicking is coming from?

Nick

[Drumster]

Hi Nick, yes Toad Sterling Excel, I'll check the wiring diagram. Tomorrow's plan is to remove scuttle and investigate further. I was just looking for suggestions.....

[SM25T]

Pull a plug out and check for sparks ?

[Drumster]

Update, looks like it was a dodgy connection on the crank position sensor as after a quick wiggle the car started. Thanks to Guy Lowe on Zetec 7s FB page.