
2003 Jeep Wrangler Rubicon 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Hard start & stall
This is my personal play toy. I use it for offroad so it is
modified, but no mods that I feel would trace back to this
issue. That is always my first on the check list, to rule
out any problems related to the last modification.
FIX posted 6/18/2012
![]()
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle (View Replies)15 Replies Received(Hide Replies)15 Replies Received
|
Message Closed w/FIX
|
VIN | 1J4FA69S23 |
Engine | 4.0 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Cuts Out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Hard Start & Stall |
Occurs | Always, on Decel, on Accel, Idle, Intermittently |
Misc. | Heavily Modified for Off Road Use. No Major Mods That I Believe Could Relate Back to This Issue. |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2003 Jeep Wrangler Rubicon
VIN | 1J4FA69S23 |
Engine | 4.0 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Cuts Out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Hard Start & Stall |
Occurs | Always, on Decel, on Accel, Idle, Intermittently |
Misc. | Heavily Modified for Off Road Use. No Major Mods That I Believe Could Relate Back to This Issue. |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |