gas mileage, 2.2 swap, low temp,

[travgag]

Hey guys, so my 2.2 swap has been good to me, no major problems, i have over 8, 000 k on the swap now,

 

now our subaru's gas milage isnt amazing, but mine seams to suck bad, im getting like 18-19 mpg (12.7-.9 l/100k) ever since it got bellow 5 Celsius,

 

And the car this summer was only about 24 mpg highway, i remember when this 2.2 was in the other car i was getting 26-27 highway and maybe 22-24 on a regular week, i don"t drive like a maniac, accelerate gently, it doesn't seam so make much of a difference,

 

Now i didnt change the ecu in the car, i read it shouldn't matter, and i dont even know were the ecu is located,

 

Also the car doesn't have alot of power, a small hill/slant going about 50 k/hr, I can put the pedal all the way to the floor, and it does accelerate to fast lemme tell ya

 

and the temperature it runs at is bellow half, the motor in the old car always ran at half, I didnt changed the thermostat, the original motor in this car also ran bellow half, so I put a cardboard to maybe bring up the temperature to maybe get better mileage but it still runs the same temp, even though the rad is 50% covered, the gauge in the cluster is okay because the old motor overheated and i saw the gauge rise lol

 

thanks

[travgag]

this is where my gauge rides at, im going to try swapping out my maf and first o2 sensor since i have spares, i think the car might be running rich, which will also make it run cooler

 

http://briancloss.com/subarugauge.jpg

[Stang70Fastback]

That's definitely a bit on the low side. Mine doesn't quite sit AT half, but it's at least halfway further to half than yours. Do you have any way of reading the temp through the OBD port? As I recall it should be somewhere around 190-195 degrees or something like that.

[travgag]

i dont have a real time reader, but i do at work, il give it a try and see what its comming through at the odb port, good idea

[subikid90]

What stang said. The sensor for your gauge and the sensor the computer uses are two separate sensor and the temp gauge one could be reading slightly off.

[travgag]

soo, i swaped out the front o2 sensor and i seam to be getting much better mileage, im at half a tank and im at 195 kilomters, were i would ussualy be at like 120-150,

 

I think when i blew the old 2.5 and all that oil went through the exhaust that sensor got a bit of an oil coating haha

 

well see what my mpg is in a few days

[broknindarkagain]

hmmm interesting...

[travgag]

well.... the results are in, im now getting 22 mpg instead of like 17-18, not bad for our subi's

[monkeyposeur]

Hmm, I have a newish O2 sensor laying around. I should swap it in and see it I get better mpgs. I'm about where you are though.