ClubCJ - The CJ Lancer Club

Has anyone changed their front oxygen sensor, got the feeling mine is due to be replaced. How much work was it, OEM vs aftermarket etc?

why do u have that feeling Akram?

is it like a tingling feeling or a slow throb?

The slow throb of my car using to much fuel, I'm using as much fuel as a RA atm I think. I know our cars run rich from factory but not this rich. So you got the know how Steve?

sleeper wrote:is it like a tingling feeling or a slow throb?

Lol

lol, no mate, i`ve never heard of it being done before, i`m not even sure what the front sensor does in relation to engine management.

it IS only a narrowband sensor though so it only reads high or low, not increments inbetween.

as to why your running very rich?, i have no idea.

maybe u should take your foot off the throttle? or maybe its the excessive heat in WA evaporating your fuel?

Even when I'm gentle it still uses more then typical, after reading what ppl on here mention about their own fuel use. My average sits around 10-12 most of the journey, doesn't sound right.

So I'm trying to trouble shoot the excessive use, I was under the impression a worn oxygen sensor would give the engine false readings so it would try to compensate by burning extra fuel?

its possible i guess but it`d be news to me akram

Now the cars are getting older te sensors may start needing replacement. Can you give any other reason for that sort of fuel use? I want to fix this problem.

Can you give any other reason for that sort of fuel use?

not really.

it`d be easy to replace, it just screws out from a bung on your engine downpipe but i`d be using an OEM replacement, all the sensors are similar in fitment but the electrical plug for the loom can differ greatly.

Run it into a Mitzi dealer and plug your car into their computer...

Have you changed type/brand of fuel?

I always use 95 or 98 octane, usually from the same outlet

like martin says, its probably much easier to get mitsu to run a diagnostic over it.

There are many things that could cause your car to run rich/use too much fuel. O2 sensors arent cheap for genuine, and would run you up at least a few hundred bucks for an aftermarket one based on other ones ive replaced. If its royally "screwed", scanning for codes will bring it up and then i would no question replace it, but it could simply be dirty and need a clean off assuming it is the O2 sensor, however i do advise taking it into a licensed mechanic to do so, as they are very sensitive and sometimes even handling them in the wrong fashion can "screw" them. O2 sensors however typically are good for 2-250km in todays cars with very low premature failure %.
Take it into a good mechanic, tell him to check it out and see what they come out with.

Tyler,mind your language please

ditch the ethanol from the fuel and you will get better kms.
I'm not sure exactly where but there was a law put in place that all fuels need to be 10% Ethanol by a certain year but i think that was for the eastern states

Also some 95 and 98 are just 91RON boosted with ethanol. giving it that higher octane rating.