i have a 1999 dodge ram 1500 4x4 and whenever i get the cat wet when im out 4x4ing it makes the truck run very eradically, i tried changing the cat and the o2 sensors but still have the same problem, anyone have ne ideas on what this could be?

 

well.. off the top of my head you may have some bad wires going to your 02's.. i had a frayed wire going to my post cat and when i went to the car was (with the underbody spray bar) itdidthe same as you described.. its a bitch to trace it though.. good luck!

 

I usually keep my pets inside the cab.... JK
I agree with SHOTT8283, Id suggest checking all your wires going to the O2 sensor. Maybe you even have a sensor that is going bad?

 

How do you know it's not something else getting wet or muddy and causing it to run bad? Could be your distributor getting wet. Or water going into your intake.

 

How about taking a garden hose and wetting down one thing at a time while the truck is running in your driveway? Start low (cat/sensors) and work your way up (distributer, plug wires, etc.) Maybe you can narrow it down that way.

 

+1
I was power washing my engine bay one time and the same thing happened. When I started the truck it ran like total crap until for about a half a mile till whatever it was dried out. I've powerwashed it since and it hasn't happened. So I'm sure it was just an exposed wire or something. I've never managed to get it to happen again though so I'm not too concerend.

I think Mike's idea of taking the garded hose and wetting down one thing at a time would be your best bet.

 

k well ill check all the wires and i ordered a new distributor cap and rotor and i guess ill see if that fixes it

 

well i changed the cap, rotor and plug wires but never got a chance to check what was making it run bad in cause later in the day 2 pistons turned to little chunks of metal in the bottom of my oil pan