Hard rattle when starting?

Hi guys, I'm still having problems with my vehicle listed above.

Here's what it's doing:

When I start it there is a hard rattle for a few seconds then it doesn't happen again, only when it's cold.

It's consuming gas beyond belief.

Cuts out/ stutters going down the road.

Keeps going into safe mode once it hits 3 RPMs.

Idles rough.

What can it be?

Also, there's a power steering thing warning light on the dash that is on.