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[Vmax]

I friend of mine has suggested that a battery without enough 'oomph' could cause my stalling problem. I'm a little sceptical, but could he be right? My battery is a 55AH which I must admit seems a little weedy for a car like this. Should it not be a 70AH?   :-?   

[Jimbob]

yes, it is too small.

Batteries
70 amp/hr (OE)                                       9201470       £107.00       £97.92       £75.48
 
2.0/2.2 - 55 amp/hr                                      19003129       £47.75       £43.70       £36.91
 
2.5 V6 - 70 amp/hr                                       93189922       £63.00       £57.65       £47.83
 
2.6 V6 - 65 amp/hr                                       93189923       £63.00       £57.65       £47.10
 
3.0 V6 - 70 amp/hr                                       93189922       £63.00       £57.65       £47.83
 
3.2 V6 - 85 amp/hr (GM85-T7)                                     19001900       £95.50       £87.38       £67.71
 
2.0TD/2.2TD - 70 amp/hr                                      93189922       £63.00       £57.65       £47.83
 
2.5TD - 85 amp/hr (GM85-T7)                                     19001900       £95.50       £87.38       £67.71

models / battery size, then retail, trade, and tradeclub all plus vat 

[Kevin Wood]

Hmm.  :-/ The battery shouldn't be doing much once the engine is running. The alternator will be more then capable of powering all the loads in the car, even when idling IMHO.

I have also noticed that cars are not normally fitted with the batteries listed - my 3.2 has a 65ah battery, which looks original. I guess in our climate Vauxhall were able to save some pennies by reducing the spec. of the battery.

However, the fact remains that you are getting code 19, and the crank sensor is known to be good, IIRC? So we must look further afield.

It wouldn't be a bad idea to check the battery and charging just to rule it out (Guide here: http://www.omegaowners.com/forum/YaBB.pl?num=1225724099) but I believe you'd have starting troubles if there was anything seriously wrong, especially given how many often it must be stalling on you! A weak battery would soon make itself known IMHO.

I would check the battery terminals for security (including the crimped connections where the wires enter the terminals) and also the grounding points (Battery to chassis, battery to engine block, loom to engine block).

If one of these were loose it's possible that noise from electrical loads could be getting into the crank sensor circuit and causing problems.

I would also check the ignition leads are in good condition, and check that the crank sensor wiring is not running too close to the leads and coil pack in case it is picking up interference from the ignition system.

Kevin

[ffcgary1]

Still think that your crank sensor is playing up, swap it for a new one and clear codes then try again. could also be the icv or cam sensor. Battery is vertually redundant once the engine is running as kevin said the alternator takes over and powers all the systems with the battery as a reserve as such.

[Vmax]

Changed crank sensor twice (both genuine VX) ICV changed EGR changed........................ :-? :-/

[ffcgary1]

Cam sensor :question

[Vmax]

I have a spare cam sensor maybe I will change that, first time someone has mentioned the cam sensor. I will see what the garage say after their inspection later.