fixer wrote:
>
> today,by the way this is a 3.3 engine,it's losing fire to spark-plugs,when
> it cuts off,no warning codes,i'm leaning toward the camshaft sensor.Does
> anyone have any tips in changing this sensor,besides a lot of praying?What
> tool do u use to make sure u have it the correct distance from the
> crankshaft pulley?Thanks for all your helpful replies.

You probably meant crankshaft sensor?
The hardest part is removing the dampner.
You can try wedging in a breaker bar on the nut and tapping the
starter or use a quality impact running 100+ psi.
I use the impact method.
Here is a link to a similar sensor install:
http://www.vortexbuicks-etc.com/cranksensor.htm