fuel consumptoin

[Steve-O 2007]

Imho if you're worrying about the amount of petrol you're using in this day and age then it's time to get rid of the MR2 and get something else!

I wouldnt be worrying if I was getting normal mpg figures but 13mpg is low as I know I should be getting more than that for near stock setup...

Could it be possible that someones fitted larger injectors on my stock engine with stock Rev2 ECU causing it to overfuel (apprently the car used to have a HKS turbo fitted) or would the car run completely crap if it had bigger injectors but still on stock ecu?

Might have found a small leak in my Intercooler pipe in one of the welds (the pipe that the dv fits to), there was small amounts of oil around the weld, I have wiped it off but if it re appears then I know its leaking

[Lauren]

I was told that sensor only does stuff at idle, does it also do stuff while your driving around??

No it is in operation for just about all throttle positions though wide open throttle most likely goes into open loop mode. So yes it does 'stuff' when you are driving around.

Noticably bad mpg is nearly always down to a dead oxy sensor.

[Steve-O 2007]

Ill get one ordered now then incase thats whats up with mine, anyone know the name of that great site for lambda sensors (cant find it )?

Oh would I get an error code if its faulty or do they sometimes not bring up error codes?

Thanks

Was this the site that people use? -

http://www.lambdasensor.com/main/mr2.htm

Also the site only has them listed for "MR2 2.0 GT (3S-GE)" Im guessing the Turbo just uses the same one?

Thanks

[Pete_MR2]

I wouldn't go crazy thinking its anything wrong just yet mate.

From my experience everyone always boasts about how much mpg they get from there tubbie - it's like car insurance, everyone always seems to get lower than you

From my experience there expensive to run but you have to expect that from a car thats pushing out good bhp figures surely! Unless its one of the new generation diesel engines and your's obviously insn't

Look at Scoobies, there known for drinking fuel like it's going out of fashion and thats a 2.0l turbo charged engine!

I used to run mine as a daily drive 2 years ago and £40 of petrol used to get me around 180 miles then the light would come on. My car ran really well and has no problems at all - its only done 27,000 miles and trust me has been pampered all its life.

Now I could be wrong here so get the car checked out but don't go running around buying parts that could be ok!

Relax and take time in sorting what the problem actually is - if there is one

Cheers

Pete

[JeffD]

Theres something definitely wrong at 13mpg - lowest it should go due to driving style is around 25mpg and if your really careful you should be able to get something in the late 30's. I reckon you should aim to be getting 30ish maybe a bit more as normal.

[Steve-O 2007]

Jeff, do you know if the Lambda sensor's part numbers are the same for NA and Turbo?

Thanks

[JeffD]

Hi Steve

Rev3+ (01/11/93 onwards) Turbo 02 sensor part no is: 89465-29805 and has 4 wires (2 black, 1 blue and 1 white) and costs approx £150 from Toyota.

Rev 1/2 sensor is (01.12.1989-01.11.1993) is 89465-29355.

IIRC Theyre different for N/A and turbo but check with Toyota - theyre listed as different on epc (GT = Turbo, G = N/A)

http://www.ayrpark.plus.com/epc/toyota/ ... _1993.html

If you ring Toyota with chasis/engine no they will tell you the exact one.

After seeing some aftermarket ones I dont think they are as fussy about the match but you pays your money and takes your choice.

[Pete_MR2]

Rogue sell them m8

http://www.roguesystems.co.uk/forms/pro ... spx?cat=26

Go to page 2

[redmr89]

i get 90 kilometers per 15 quid. which is 55 miles , ie 18 miles per gallon, which is rubbish, last rr session i had they said my car could have much more power if it wasnt vastly overfueling. which confuses me a bit cos it always flys through its mot on emmitions. odd. ive changed all my ignition components, but not my lambda sensor. cos i dont have the kit to test it. and it seems expensive to change if it isnt the problem, do rev ones have a crap fuel map?

[Steve-O 2007]

thanks Jeff, been doing some searching and quite a few people have uesd that lambda site and it seems good so will email them thanks.

Rogue sell them m8

http://www.roguesystems.co.uk/forms/pro ... spx?cat=26

Go to page 2

Thanks but they only have the 4 wire ones, will contact them and see if they do the single wire ones

Thanks

[JeffD]

Steve, is it not a 4 wire one you want? if you unplug it (a job in itself LOL) you can see - should look like this...



Are you sure your not mistaking the sleeving round the wiring for just being 1 wire? See pic below of a rev3+ turbo sensor - you can see the individual wires at the end



BTW Ive bought a sensor before of justlambda for my N/A but TBH I'm just a bit dubious as to how long they last compared with the real deal ones. I do appreciate they cost more though! :-( Horses for courses and all that LOL

[JeffD]

Just had a look throgh the "gold portfolio" at some of the reviews and for a 1991 turbo they were getting 22mpg general/29mpg on the "highway".

Another lists 20/27mpg and as mentioned earlier I get 29mpg without trying to economise so you should be somewhere in that range ..or better hopefully! :-)

For comparison the MR2 brochure lists an N/A as 22mpg urban/40.4 extra urban and 31 combined.

Less than 20 and I reckon you do have a problem.

[Steve-O 2007]

Steve, is it not a 4 wire one you want? if you unplug it (a job in itself LOL) you can see - should look like this...

No its a Single wire, mines a Jap 1994 Rev3 NA thats had a Rev2 Turbo Conversion

Going to look into testing it to see if its still working as its possible to do this isnt it?

Thanks