my 96 dodge ram 360 is having a ton of problems. its misfiring on every cylinder (i was told the ignition coil would solve this) check engine light is on (the o2 sensor) and i plan on fixing them tomarow. but earlier today i started it and its runnin at about 1400-1800 rpms at an idle cold. i got a few suggestions but i have no idea which one is the problem. anyone know whats causing this or if these problems are tied together?

 

Probably an assortment of problems.

First thing to check though, is the plenum. (see the stickied thread at the top of this forum) I am going to guess that is the major contributor to the rest of your problems. (misfires, O2 sensor, and possibly even the high idle. Its a major vacuum leak.) Do you also have oil consumption problems?

 

If the O2 sensor code is the front/first sensor, that could be causing almost all the issues. That sensor helps the PCM control the air to fuel ratio. What was the exact code?

I'd also follow HeyYou's suggestion as well. You are probably dealing with multiple faults.

 

yea it goes through quite a bit of oil. im aware of the plenum plate and what it can cause but i was trying to avoid having to tear off the top of my engine but it looks like i might just have to.

 

i dont remember what the exact code was but i do know that its the back sensor. i had a buddy scan it for me.

 

The post-cat sensor really doesn't have much affect on how the truck runs, it is just monitoring the cat. The sensor itself may be fine, and the cat is what is causing the trouble......

Need to address the plenum first, get that dealt with, and see what other problems it also clears up.

 

the cat isnt even a year old. i replaced it thinking that was the problem but it didnt fix anything. as for the plenum i pulled the air box and put a swab down one of the TB barrels and swabed the top of the plenum but there was no oil pooling up. i was told that oil pooling on top was a big indicator of a bad plenum but there was none there.

 

and another thing... if im gonna rip apart the engine, is there anything else i should check or add while i have it apart?

 

What color is the truck?

 

emerald green