I have a Vr 94 commodore no modifications which for 18 months has had a random problem where it turns over but fails to start. sometimes ok for a few days,when it fails there is no pattern but often will start after 30 minutes +. Has come up with faults 41+42 crank angle sensor/DFI-now both have been replaced still problem.battery,plugs have been replaced. Electricians are saying that faulty wiring can cause incorrect fault readings is a well known fault in commodores. Does nay one have experience of this?