Over voltage is usually over 15.5v, yes the VZ is the last of the regulator in the alternator commodores. Pretty easy to diagnose with a really cheap amp clamp and a basic multimeter. It's not just voltage that is put out by the alternator but amps as well. So you need as an average, less than 15.5v going back into the battery, as well as around 2 amps more than going out of your battery, ie if the draw out of the battery is 68 amps, the the alternator should be putting in around 70 amps. The contacts inside the relays get burned over time and create higher resistance and hence get hotter, replace them if they are really bad. Remember a relay is basically just a type of switch, nothing complicated to them, but they do go bad. If your battery is bad, your alternator can appear faulty. Try a new or known good battery in the car and see how you go. If you have the sticky indicator, just google it and you will come up with the fix, it's just a relay in the BCM that needs replacing.
Misfire. no codes came down to replace all coils & idle fixed.
VT-VY
Cuts out, hard to start
Faulty wiring in fuel tank, replace fuel pump assembly or if losing spark - coil pack assembly.
VZ ,VE,Rodeo 3.6 v6 mifire codes ie ,cyls 1,,3,5 or other bank 2,4,6 Top of engine sludged up with oil,cam drivers are oil press operated and as oil pressure increases opens and closes ports on drivers to feed oil to convertors on camshafts and this increases and decreases advance ,if ports blocked cannot work,inspect and clean or replace cam drivers,note this is a common fault
VZ-VE V6
Misfire. No fault codes.
Coils misfiring ( Common fault) replace.
VZ- VE V6
Car wont start or runs worse after lifting manifold off
When you lift manifold off to check or replace coils or injectors it damages wiring loom to coils (gets brittle from heat). Replace loom kit to coils.You can get new loom kit from holden approx.$300
VZ-VE V6 Cam sensor codes BEWARE-test cam sensors,try swapping to get rid of code-Timing chain worn and cams are out of sync-replace timing chain kit major job-NOTE this is a common fault
VZ-VE /Rodeo V6
Misfire and or injector code after fitting coil
Faulty ECU not firing 1 injector,check with noid light,due to a faulty coil,the 4th wire on coil is a feedback to ECU so when a coil has a problem the ECU turns off injector to that cyl so raw fuel doesnt stuff up CAT-if coil has a short it damages inj driver in ECU.we have pre programed ECUs in stock-note common fault
VZ-VE 6 code /cyls 1.3.5 or
2.4.6 misfire Timing chain streched-or cam driver stuck on due to sludged up oil-read above section
VE-V6 Fa
