the Omega (3.2 v6 ) has for the last few weeks had a starting problem , it would start/drive fine all week but for some strange reason it would not start on a Saturday between 5pm and 6pm for 3 consecutive weeks ( began to think the damn thing was possesed ) . However it threw me a wobbly yesterday evening ( strangly at 5.45pm ) and would,nt start . So took it today to the Vauxhall autospark i know and he checked it out on Tech 2 and found nothing registering anywhere at which point a mechanic was called across who said it was most likely a crank sensor fault . Is this most lkely the explanation or any other ideas ?? , if it is the crank sensor, what price am i looking at for one , and cost of installation  :(

AllyM wrote on 29. Apr 2008 at 18:20:

the Omega (3.2 v6 ) has for the last few weeks had a starting problem , it would start/drive fine all week but for some strange reason it would not start on a Saturday between 5pm and 6pm for 3 consecutive weeks ( began to think the damn thing was possesed ) . However it threw me a wobbly yesterday evening ( strangly at 5.45pm ) and would,nt start . So took it today to the Vauxhall autospark i know and he checked it out on Tech 2 and found nothing registering anywhere at which point a mechanic was called across who said it was most likely a crank sensor fault . Is this most lkely the explanation or any other ideas ?? , if it is the crank sensor, what price am i looking at for one , and cost of installation  :(

Possibly, but not convinced.  Crank sensor is a common fault, but normally leaves a code in the engine management.

Try it with foot hard to floor (shouldn't start) for 5s, then try normally, see what happens then...

Tried that , tried starting it with foot down , foot pumping accelerator , foot on brake , getting out the car and in again ( first thought was immobiliser ) tried swearing , talking nice !! ... stubborn bugger  , ( did Vauxhall make gender specific cars  ;D ::)

Having similar problems with my 2.2 CD auto.  :yIF I get to the bottom of it I will let you know. And you do the same please.. Gooders

Have a look at my post "intermittent starting problems" on page 3. That gave me a good few ideas. Gooders

Cheers for that !! , mine,s tries to start but just won,t kick in ??

Mines just totally dead as if the batts flat but it aint.

AllyM wrote on 29. Apr 2008 at 18:31:

Tried that , tried starting it with foot down , foot pumping accelerator , foot on brake , getting out the car and in again ( first thought was immobiliser ) tried swearing , talking nice !! ... stubborn bugger  , ( did Vauxhall make gender specific cars  ;D ::)

So what happens after cranking for 5s with foot through floorboards (not pumping), then attempting to start normally?

cranking at WOT disables injectors, and can clear a flooded engine (ie, if injectors are leaking when stood still)

Got the car back today , new crank sensor fitted , working well .................so far !! ::) ::) ::)