Need help for 2003 Dodge Ram 1500 rough idle issue
Just joined after searching threads for my issue. I'm looking for help with a 2003 Dodge Ram 1500 quad cab 4x4 rough idle issue with 5.7 hemi.
Truck rolled 200,000 miles last weekend during a college move-in trip from OH to SC and back. Made the trip down no problems - stopped after 6 hrs and finished 2nd day in 4.5 hrs. Drove straight back 10.5 hours last Sunday.
We were about 1.5 hrs from home when truck starting choking and sputtering. Really rough idle - engine light came on. We were 84 miles from home and I was concerned if we stopped for the night it might never go in the morning. We continued on home, arriving after 1 am and the truck DIED in the driveway.
That was last Sunday, since then I have change all 16 spark plugs. Truck still has very rough idle. Max rpm is 3500-3600 with foot fully on the gas. Won't go past 3600. Truck dies out completely whenever I stop reving it.
After reading various threads - I'm seeing possibly catalytic converter issue, possible 02 sensors, etc. etc. etc. I'm thinking it's most likely the catalytic converter which has never been changed - I'm the original owner.
Cat from dealer is $1100 and has to be ordered. Auto parts stores appear to only have 2WD Cat. Summit Racing said there doesn't appear be a magnaflow cat for 4WD.
Since I don't know what the problem is, I thought I'd ask your advice before I start more money and time at it!!
What are your thoughts. What direction would you go to next?
Last edited by bwstewart; 08-20-2011 at 10:57 PM.