How much should replacing an idler pulley cost

Is it possible that the guage is failing and would need replacement? What is the cost of replacement? Every other day.

I moved my car to higher ground during a flood. Had to back it up in water that got a few inches above the interior floor. Now, sometimes when I'm at at low RPMs or at red lights, my car dies completely and I have to re-turn the ignition. Best solution is keeping a foot on the brake while increasing RPMs to around 1000. What are some of the parts that might have been damaged to cause this?

Buy the parts and do it myself

My friend says her mechanic states the trouble codes for a catalytic converter for her car. She's already replaced it and is hundreds in the hole for now. How often does this happen with new cars? I have a '92 Camry with the same converter and only the EGR has been replaced... Anything to be concerned with?

just change my fuel pump and filter because
car was shutting off both on idle
and driving,nothing has change since,
it still does the same,though has gotten
a little better but on acceleration while
doing a drive test it seems to jerk for
a few seconds while holding the pedal then releases,this is at 3,000 rpm reading. the car has no problems starting,been starting it everyday and just driving around my resident area.
the shutting off only occured once but the jerking thing continues at 3,000 rpm on acceleration but it does releases
and the car continues to drive normally.
nothing technical as i know,whats causing this.

Car will start and run fine but no matter what gear you put it in (p,r,n,d4,d3,2,or 1) it want go anywhere and when you put it in reverse and hit the gas it tries to move forward just a little, will sometimes do it in park, any help would be nice. I have already changed the soleniod on the trans

i bought finders and lights for my 94 and they dont match i have a gap between the lights and finder whys that

Where can I go to get this fixed and how much would this cost?