Hi Guys, I have searched pretty hard and everything is pointing toward o2 sensor but guess im looking for people have been through the same just incase.

2001 TJ exec, 220 000km. highway driven in family since new.

Fuel has been around 10.5L/100 constantly for the last 2 years (higher then what it was prior to timming belt swap) but never worried about it.

More recently (last week) is gone to 12, and today I noticed 13.5L/100 (on board computer).

I must admit to noticing a rich fuel/oil smell and smoke on start up for some time and more so recently when idling after driving.

Idle on startup is up around 1500-1800rpm from memory at times which seems high?

No stuttering or flat spots...... yet.

Dads got a 3.5lL TH if its the same sensor I guess I can pull and swap/test.

Any help greatly appreciated.

Regards,

Aaron.

If it is the oxygen sensor, and your fuel economy changes suggest that it is, the simple test is to unplug the sensor - the connector won't be far from where the cable enters the cabin on the passenger side of the center console (just below the edge of the carpet). After disconnecting the sensor, reset the ECU by disconnecting the battery (make sure that you know where to find your radio code), then take the car for a run to check fuel usage and behaviour - if things improve, it is likely that the sensor needs replacement.

thanks mate, will check it out.

Er....where DOES the radio code live ? I went through this kind of drama years ago with a cassette player. And I will be disconnecting my TJ battery soonish. I can't see a code written on my handbook anywhere.

The radio code lives in the computer on the service desk of your local Mitsu dealer. Give them your VIN and all shall be revealed. Assuming it is the original factory radio. A financial transaction may be involved in this process.

Oh dear....I thought as much. Someone wanted $30 from me a few years ago for a cassette radio code.

What do people do when they holler for a Marshall to change batteries ? Hook up a small 9 volt battery in parallel to the terminals to keep the CD / radio "alive" ??
I'll phone Mitsubishi to ask their price.

Oh dear....I thought as much. Someone wanted $30 from me a few years ago for a cassette radio code.
As I recall, when the car was originally sold as new the radio code came on a card that came with the owners manual, but that sort of thing usually gets lost between owners or houses...


What do people do when they holler for a Marshall to change batteries ? Hook up a small 9 volt battery in parallel to the terminals to keep the CD / radio "alive" ??
I'll phone Mitsubishi to ask their price.
If you're just trying to change the car battery, that (or a battery charger) might work. The ECU can be reset (for the purposes of this thread) without disturbing the radio by unplugging all the ECU connectors with the ignition OFF, then plugging them back in. Most people don't do it this way though because getting to those connectors isn't as easy as getting at the battery terminals...

Some dealers will look up the code for free, others charge a nominal amount.
Good time to put in an after market radio, much more capable than the original anyway.

This is a good one:
http://www.jbhifionline.com.au/car-sound/car-dvd/pioneer-mvh155ui-200w-mechless-usb-ipod-aux-head-unit/672711?utm_source=JB-AU&utm_medium=button&utm_content=buy-online-button-tvs&utm_campaign=buy-online-button

JB-HiFi has specials at times. I bought 2 of these at $55 and $62.
Just put your mp3s on a USB stick, no need to burn CDs.