Changed Air Filter now it wont run properly

[YarisSedan]

What you did is a trick us mechanics use sometimes. If you suspect a faulty MAF if you disconect it the computer uses the last known good reading and adds and subtracts to it based on the other good remaining sensors to determine the fuel control.

So if you disconect it and the vehicle runs better. Then you can know for sure if the sensor is faulty or not.

[bahamasvitz]

Originally Posted by YarisSedan

What you did is a trick us mechanics use sometimes. If you suspect a faulty MAF if you disconect it the computer uses the last known good reading and adds and subtracts to it based on the other good remaining sensors to determine the fuel control.

So if you disconect it and the vehicle runs better. Then you can know for sure if the sensor is faulty or not.

i tried it again tonight but it kept trying to cut off when I slowed down. Throttle response was better though on average. It was really hard to start. :( Hooked it back up and reset the CPU (pulled battery negative for a few minutes) so the dealer doesnt see that code. Also, with it connected again etc, bad throttle response, litterally I had to pull off the road and let traffic past at one point, then it kicked in and finally I was able to move. Anyway, I noticed in 1st gear (its an Auto AWD) i didnt notice any throttle issues.