lost on an
Join Date: Sep 2011
County: Australian Capital Territory
More information would be handy.
"Complete loss of power", i.e. 0 kW, means no fuel, air (tricky to achieve) or spark. A complete failure of the in-tank fuel pump could be the cause. Mine did that, but there were symptoms in the prior months.
If it is a large loss of power, and what the theme of the discussion seems to be about, then a camshaft position sensor error for the engine management light would be the most likely scenario. In my case the chain had stretched and the engine was noisy, but I never had the error before I replaced the chains. The secondary chain tensioners were at maximum extension for each chain and in this condition my mechanic told me that Commodore V6 engines have had chains skipping teeth on the cogs.
The engine runs three chains, a primary chain from the crank to an idler gear and then two secondary chains that drive each bank. Any of the chains can give you problems. Holden changed the material used around April 2007 to include titanium in the chains according to a Holden parts retailer that I dealt with. The slipper pads that attach to the tensioners can also get worn away. Knowing what to replace before the engine is taken apart is difficult, and that requires the engine to be taken out of the car. If your engine was quiet then I'd probably change everything apart from the camshaft sprockets. These will be fine if the chain teeth aren't damaged.
If you'd like more info on part numbers PM me as I don't check this site all the time.