Motor failure

What auto are they talking about? What engine has the vehicle starts or not? If you have three cylinders without working the car is not going to start? If the spark plugs come out black and not wet then they are running and you have a fuel exile, if you have bad valves you have bad comprehensive and also against explosions towards admission or escape.

It is a Saturn Vue 2003 3.0 DOHC.

If they come wet, the first thing you should verify is whether there is a spark

They hear and why we don't start from the beginning, what if they are the spark plug cables? In my Nissan Quest I had that same problem, the spark plugs (and dry) came out, and it turned Failure perceived then you have to look for him, they can even be the injectors, but first the first, to see how you go.

What vehicle is it?
Do you have a spark in the cylinder cables that fail?
did you check their compression?
Is it with a distributor or is you with ecendido dis?
Tyrans some data have site we can help
a hug