Idle fluctuate or idle surge?

DAVID DAVO ESSIEN

MEMBER
2007 TOYOTA CAMRY
2.4L
4 CYL
TURBO
2WD
AUTOMATIC
159,753 MILES

I Received a call about 6pm today from a fellow engineer to come over and check a car and rectify the problem. I asked the car owner as well as the engineer what was done previously to the car before the problem set in. He said that he just bought the car not long ago and it was consuming excess fuel. The catalytic converter was removed, thus the net was used for the construction in place of a new catalyse. The Engineer also recommended servicing, which he later did. Unfortunately, after cleaning the throttle body and reinstalling it the problem. The idle was fluctuating please how can I solve the problem? What should I do to bring the idling of the car down to steady 1,000 RPMs again?

Image & Video (Click to make bigger)

1 Reply

MATHGEN

MECHANIC
128 POSTS

Hello. The first thing that comes to my mind is a dirty or contaminated MAF sensor. It's located in the air cleaner assembly and sometimes it can get debris (usually an insect leg or wing, haha) touching the sensor wire. This can happen if the air cleaner housing has been opened for service. I would remove the sensor and clean it out with MAF sensor cleaner. Make sure to use a cleaner specifically for MAF sensors. Anything else will damage the sensor and it will need to be replaced. After cleaning, reinstalling and hopefully all will be well.

Image (Click to make bigger)