can anyone help me i have a 98 verada which is using approx. 15 lts to 100ks, have had the so called "experts" look at it and they cant find the problem. I can also smell petrol when driving with windows open, have had a full service including fuel filter. the only mods are exhaust from cat back and lowered springs? no signs of fuel leak when on hoist

How many kilometres do you get out of a full tank?
Im experiencing high fuel consumption as well.
I have a 96 Verada.

I get approximately 380Kms out of one full tank!
I think thats rather high comparing with all the other forum members as they are getting around 500-600kms...

Ive nearly finished servicing my car, and I shall see if that will do any help towards my fual consumption.

Oh yeh sorry cant help.
LOL

But im feeling your pain brother!

Have they checked your O2 sensor? A failed O2 sensor can cause your car to run rich as a safety precaution.

Both my KH and KJ smell like fuel big time when you get out of the car from near the fuel cap area. The caps are on nice and tight, they are in good condition and i have even checked all the connections at cap and and at tank end and everything is nice and tight.

Strange

i don't know how those ppl get such good fuel consumption honestly (some get over 600kms even though they are doing over 60% city driving :doubt: ). compared to holdens and fords, yes the magna does appear to have much better fuel efficiency. but all the mitsu mechanics i've spoken to say magnas have shiat fuel economy... and there is no reason for them to say that other than if it's the truth. from my experience, if i go mostly freeways i can get 700kms out of a tank no problem. but if it's stop go traffic in heavy traffic >80% of the time you can get as low as 350kms from a tank, and that is by no means strange.

Have they checked your O2 sensor? A failed O2 sensor can cause your car to run rich as a safety precaution.

So is high fuel consumption the only symptom of this or are there other indications?

Mine seems to change. Like today I drove 100k's and its only dropped a little bit. The other day though I drove 50'ks and the bloody petrol was almost vanishing from the tank.

I have the same problem in a 2003 TJ2 AWD - high fuel consumption, and poor acceleration (ie. if you floor it to overtake, it drops down 2 gears, revs very high, and doesn't get anywhere). This is in stark contrast to another AWD I drove (same Klms, same build date) where you had to watch out you didn't clean up the car in front of you when taking off from the traffic lights...

The other AWD got 11.6 city, 8.2 Highway, this one gets 13.8 city, 9.6 highway. Yuk.

I am taking it in to Mitsubishi, as this isn't acceptable. Just had a full 45K service, and it drives like a slug.

Possiblities are (from Mitsubishis service manual)

Ignition Coil, spark plugs, spark plug cables
Compression Pressure
Check the fuel filter or fuel line for clogging
Broken air intake hose
Clogged air cleaner
Clogged exhaust system

Oxygen sensor doesn't appear to have a code when it dies (from manual) but they last only about 60,000K so quite a possibility.

Cheers
Heath Young

So is high fuel consumption the only symptom of this or are there other indications?
It'll probably drive like poo in closed loop mode (at low load conditions), and suddenly change behaviour when it hits open loop.

As heathyoung says, there doesn't seem to be an ECU fault code for a busted O2 sensor which is odd. It's easy enough to test with a multimeter though, or get your workshop to check it out.

My 6g72 Manual is flat out getting 400k's from a Tank !!!

There has to be something wrong, It may be my Lead foot....

Possiblities are (from Mitsubishis service manual)

Ignition Coil, spark plugs, spark plug cables
Compression Pressure
Check the fuel filter or fuel line for clogging
Broken air intake hose
Clogged air cleaner
Clogged exhaust system



That should answer everyones question on this topic.

Also make sure you dont have heavy things in the car weighing it down.

Quote
I have the same problem in a 2003 TJ2 AWD - high fuel consumption, and poor acceleration (ie. if you floor it to overtake, it drops down 2 gears, revs very high, and doesn't get anywhere). This is in stark contrast to another AWD I drove (same Klms, same build date) where you had to watch out you didn't clean up the car in front of you when taking off from the traffic lights...
The other AWD got 11.6 city, 8.2 Highway, this one gets 13.8 city, 9.6 highway. Yuk.
I am taking it in to Mitsubishi, as this isn't acceptable. Just had a full 45K service, and it drives like a slug.
Possiblities are (from Mitsubishis service manual)
Ignition Coil, spark plugs, spark plug cables
Compression Pressure
Check the fuel filter or fuel line for clogging
Broken air intake hose
Clogged air cleaner
Clogged exhaust system
Oxygen sensor doesn't appear to have a code when it dies (from manual) but they last only about 60,000K so quite a possibility.
Cheers Heath Young

Hi Guys 2 things the Mitsu manual doesn't tell you.....
1st thing to check is the PC valve. It gets clogged with oily crankcase fumes that harden & cause the valve to get stuck open. So now you no longer have an engine that runs efficiently with good vacuum when cruising. The intake is continually sucking in these oily fumes (which changes your fuel/air mixture into something like that of an engine that burns oil due to worn rings) So now you're pressing further down on the loud pedal - which causes the TPSensor to tell the computer to feed in more fuel.....
Do a search for PCV and it will tell you how to clean it

2nd is the EGR valve on some models that lets exhaust fumes back into the plenum to reduce emissions. On a properly working EGR valve this doesn't happen when accelerating or idling.
To test - while car is idling push the moveable part out just 5mm and watch the engine die...
Anyone with poor idle should clean both.

Cheers Barry :cool:

Oxygen sensor doesn't appear to have a code when it dies (from manual) but they last only about 60,000K so quite a possibility.

This little gem of information comes from where?

The other AWD got 11.6 city, 8.2 Highway, this one gets 13.8 city, 9.6 highway. Yuk.


that sounds pretty normal i would of thought, for an AWD :confused:

Sarras - this comes from an Auto Electrician with 25 years in the business who is also my father-in-law. I have heard it from a few mechanics here and there as well...

Also, for some very strange reason the Mitsubishi computer doesn't put up an error codes for an 02 sensor, you actually have to watch that it works properly on a scope/multimeter (easier on a scope)

Cheers
Heath Young

Very strange that an 02 sensor would die at only 60,000km's. That would mean a hell of alot of warranty claims, Mines done 124,000k's and my 02's fine, the workshop were i work regularly have cars with 200,000k's plus with original 02 sensors. out of the 14 cars ive owned the (all had over 100,000k's on them and not one dead 02 sensor.

Also worked for a dealership for a while and never had to replace 02 sensors either on such "young" cars, or when i worked for a spare parts place the 02 was hardly ever asked for.

And i have had my car plugged into a diagnostics computer and it can find whether or not the 02 is working, mitsu can do this to (they did on my sisters magna).

i dont know if this is relevant, but when the fuel light comes on, u can generally get another 70 - 80 Ks.

i dont know if this is relevant, but when the fuel light comes on, u can generally get another 70 - 80 Ks.

Yeah its relevant, and perhaps all these have to do with the V6 compared to a 4 Cylinder engine of only 2.4L? I am sure that is part of the reason why some of you guys get thier fuel eaten much faster than others.

Check my fuel gauge and the kms recorded when it was top up. Also do note that once you reach half tank mark, the fuel meter runs faster than the first half. so ultimately I hit at least 500kms in city driving conditions. There is something called tapping your accelerator and not stepping on it full throttle. If you are tapping your accelrator and not reaching these kms then you better check the fuel filter and the petrol system. However I still believe the V6 engine plays a part in the fuel economy. As mine is only 4 cylinders, I don't think it eats as much as the V6 as the V6 is much powerful engine than mine.

Cheers!

i dont know if this is relevant, but when the fuel light comes on, u can generally get another 70 - 80 Ks.



I think ncik has a point, you are saying that you only get 'x' amount of kms out of a tank, but how many litres is that? are you getting only 400k's out of a tank, and its taking 50l to fill it? remember its a 71l tank, on the te anyway. i know it only takes me 50l to fill my car once the fuel light comes on, so there is another 20l in there somwhere. i get about 600k's to a tank, but i drive another 100 after the fuel light starts...

iirc the v6 was more economical then the 4cyl. Probably due to the fact that the v6 doesnt have to work as hard hauling the heavy car round.

I have no worries in getting 10litres per 100k's round town (550k's to 55lt).
on the highway i get nearly 800k's from a tank (65lt).

and these were worked out over several tanks, not just a once off thing

I'm almost the same as TFV630. With these fuel prices I have been driving like a grandpa for a few weeks now, and so far i've managed to sneak it under 10l/100km mostly town, 385km to half a tank, filled it up took 35litres, very little highway driving. But that's being really gentle and judging lights and slowing down a little earlier to prevent fully stopping etc. I reckon ya should be able to do better than 350km to a full tank, even one tank where I was driving enthusiastically from full to empty I just got 380km for 58 litres or something, 13 litres to go so 400 was achievable. But I always keep the fuel injection services up to date as well.. give that a go.

I have the same problem in a 2003 TJ2 AWD - high fuel consumption, and poor acceleration (ie. if you floor it to overtake, it drops down 2 gears, revs very high, and doesn't get anywhere). This is in stark contrast to another AWD I drove (same Klms, same build date) where you had to watch out you didn't clean up the car in front of you when taking off from the traffic lights...

Cheers
Heath Young


I get very similar consumption if not worse in 2003 KL AWD. However mines not sluggish off the mark at all but occassionaly it will kick down two gears on the hwy and yes you will go nowhere. However I live in the city and get a lot of stop start traffic. A bored or flowed t/b helped a lot to improve the off the mark performance and new rear muffler improved top end performance. Still lot of things to go though.