RickDaTuner
12-21-2006, 05:55 PM
.. Err I mean MAF...
so for a while now I've been noticing a huge drop of Fuel Economy on my beast, I went from averaging 430km to 60 liters of fuel down to a measly 360km... not fun when the car already guzzles gas like its an alcoholic at Oktoberfest.
That issue combined with a CEL that would sporadically appear when it rained, lead me to inquire further.
A somewhat long drive down to a local (to you Calgarians) Auto value was made, in order to make use of their free OBII scan tools... "A-ha!" I said "we have a win"...
P0171 System Too Lean (Bank 1)
oh shi-take mushrooms... we have a looser.
this code meant one of a many things, here are some just to name a few
-I had tuned my car to run way to lean and the ECU wasn't happy
-The front O2 sensor had call it quits ( big money)
-there was some sort of small creature living inside my intake track...
-or I had one seriously dirty MAF
The local help at the Auto Value kindly cleared the code, rest my ECU and I was on my way.
For about 1 week I had notice my fuel range decreasing ever so slightly and my AFR gauge was doing silly things, randomly going from a nice and stead fuel saving 14.7 all the way down to a gas guzzling knock inducing 9.0 AFR.
A quick log run from my UTEC revealed my stock injectors were running 110% injector duty cycle during those bouts of hella rich fuel mixtures, haha
well I started do some research on Nasioc, and was directed to this thread
http://forums.nasioc.com/forums/showthread.php?t=475620&highlight=p0171
"eureka," I said, followed by "damn this looks expensive."
So I started going down the list, and didn't really get a hit until I went down to my local NAPA and bought my self some Intake cleaner, put my MAF in a ziploc bag (as was suggest by other fellow STI owners) and gave the senor a good bath, in smelly super flammable liquids... mmm can you smell the cancer forming...
Then allowed the MAF to dry and put here back in the car
BINGO!!
as soon as i started the car, the AFR shot all they way up to 16.3 followed by a much more smooth and appealing engine tone.
Took the Roo for a spin and was getting a sporadic AFR again, but this time on the opposite side of things..
16.0-17.2-15.5-.14.7 and then stayed steady at 14.7
Sweet the ECU was happy again, the car gained power and was sounding super smooth...
pheeeeewww, and from the start of all this I though I was gonna have to shell out some big money for a new sensor.
And all it took to fix was a 10 dollar can of maf cleaner...
wooot!
here are some pictures of my date with the MUFF... i mean MAF...
Here it is out of the car, I swiped a finger across the caseing to show how much dirt was actually on there
http://www3.telus.net/duarpa/maf1d.jpg
and another angle
http://www3.telus.net/duarpa/maf2d.jpg
the back side
http://www3.telus.net/duarpa/maf3d.jpg
here is a shot of how dirrty the cleaning fluid was after the first bath..
http://www3.telus.net/duarpa/maff.jpg
and now here it is all clean and ready for more fun
http://www3.telus.net/duarpa/maf1c.jpg
and another shot
http://www3.telus.net/duarpa/maf2c.jpg
and what was the cause of such a dirrty MAF sensor.....
this
http://memimage.cardomain.net/member_images/7/web/2311000-2311999/2311651_12.jpg the short Ram intake made by K&N desinged to increase horse power...
haha
Happy Tuning
so for a while now I've been noticing a huge drop of Fuel Economy on my beast, I went from averaging 430km to 60 liters of fuel down to a measly 360km... not fun when the car already guzzles gas like its an alcoholic at Oktoberfest.
That issue combined with a CEL that would sporadically appear when it rained, lead me to inquire further.
A somewhat long drive down to a local (to you Calgarians) Auto value was made, in order to make use of their free OBII scan tools... "A-ha!" I said "we have a win"...
P0171 System Too Lean (Bank 1)
oh shi-take mushrooms... we have a looser.
this code meant one of a many things, here are some just to name a few
-I had tuned my car to run way to lean and the ECU wasn't happy
-The front O2 sensor had call it quits ( big money)
-there was some sort of small creature living inside my intake track...
-or I had one seriously dirty MAF
The local help at the Auto Value kindly cleared the code, rest my ECU and I was on my way.
For about 1 week I had notice my fuel range decreasing ever so slightly and my AFR gauge was doing silly things, randomly going from a nice and stead fuel saving 14.7 all the way down to a gas guzzling knock inducing 9.0 AFR.
A quick log run from my UTEC revealed my stock injectors were running 110% injector duty cycle during those bouts of hella rich fuel mixtures, haha
well I started do some research on Nasioc, and was directed to this thread
http://forums.nasioc.com/forums/showthread.php?t=475620&highlight=p0171
"eureka," I said, followed by "damn this looks expensive."
So I started going down the list, and didn't really get a hit until I went down to my local NAPA and bought my self some Intake cleaner, put my MAF in a ziploc bag (as was suggest by other fellow STI owners) and gave the senor a good bath, in smelly super flammable liquids... mmm can you smell the cancer forming...
Then allowed the MAF to dry and put here back in the car
BINGO!!
as soon as i started the car, the AFR shot all they way up to 16.3 followed by a much more smooth and appealing engine tone.
Took the Roo for a spin and was getting a sporadic AFR again, but this time on the opposite side of things..
16.0-17.2-15.5-.14.7 and then stayed steady at 14.7
Sweet the ECU was happy again, the car gained power and was sounding super smooth...
pheeeeewww, and from the start of all this I though I was gonna have to shell out some big money for a new sensor.
And all it took to fix was a 10 dollar can of maf cleaner...
wooot!
here are some pictures of my date with the MUFF... i mean MAF...
Here it is out of the car, I swiped a finger across the caseing to show how much dirt was actually on there
http://www3.telus.net/duarpa/maf1d.jpg
and another angle
http://www3.telus.net/duarpa/maf2d.jpg
the back side
http://www3.telus.net/duarpa/maf3d.jpg
here is a shot of how dirrty the cleaning fluid was after the first bath..
http://www3.telus.net/duarpa/maff.jpg
and now here it is all clean and ready for more fun
http://www3.telus.net/duarpa/maf1c.jpg
and another shot
http://www3.telus.net/duarpa/maf2c.jpg
and what was the cause of such a dirrty MAF sensor.....
this
http://memimage.cardomain.net/member_images/7/web/2311000-2311999/2311651_12.jpg the short Ram intake made by K&N desinged to increase horse power...
haha
Happy Tuning