just put in cold air. Need help - Toyota Yaris Forums

Tamago · 02-15-2009, 10:40 PM

mass airflow sensor works by "measuring" the velocity and temperature of air that passes past the sensor. if you change from a 2" to a 3" pipe the MAF measures X amount of air and is actually receiving 30% more air. not sure that it would cause a CEL that quickly that's why i asked if you'd wired everything correctly.

LtNoogie · 02-16-2009, 12:04 AM

Quote:

Originally Posted by Tamago

mass airflow sensor works by "measuring" the velocity and temperature of air that passes past the sensor. if you change from a 2" to a 3" pipe the MAF measures X amount of air and is actually receiving 30% more air. not sure that it would cause a CEL that quickly that's why i asked if you'd wired everything correctly.

Since the tube is wider, I assume that the same amount of air that the engine consumes is moving slower past the MAF sensor. That may skew the temperature that is being sensed.

Niko · 02-16-2009, 02:13 AM

well i went to check like you said and i found that it was a number of air leaks that were causing the sensor to not read correctly. I used a sealent to fix the leaks and just got back from i two hour drive and the car ran great and no check engine light.

Niko · 02-16-2009, 02:15 AM

thanks for the info guys. i really have no where else to go to get help for my yaris because my family is an american car family.

02-15-2009, 10:40 PM	#1
Tamago View User's Garage Drives: UZJ100 Join Date: Dec 2006 Location: Off Grid Posts: 4,916	mass airflow sensor works by "measuring" the velocity and temperature of air that passes past the sensor. if you change from a 2" to a 3" pipe the MAF measures X amount of air and is actually receiving 30% more air. not sure that it would cause a CEL that quickly that's why i asked if you'd wired everything correctly. __________________ Been a long time messing with cars..

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02-16-2009, 02:13 AM	#3
Niko Drives: 2008 toyota yaris sedan Join Date: Feb 2009 Location: Magna, UT Posts: 10	well i went to check like you said and i found that it was a number of air leaks that were causing the sensor to not read correctly. I used a sealent to fix the leaks and just got back from i two hour drive and the car ran great and no check engine light.

02-16-2009, 02:15 AM	#4
Niko Drives: 2008 toyota yaris sedan Join Date: Feb 2009 Location: Magna, UT Posts: 10	thanks for the info guys. i really have no where else to go to get help for my yaris because my family is an american car family.