gx470_05

anyone know if the MAF on a 2005 is the karman vortex type?

I was thinking of cleaning the MAF with the CRC MAF Cleaner, but it states not to use it on karman vortex type MAF (some Lexus model).

Thanks in advance.

mann777

Yes you are right the MAF type in Lexus is equipped with Karman type Mass Air Flow Sensor, which uses a moveable mirror and transistor to measure the Air Flow wake within and the trasmittor sends signals to the ECM to adjust the air flow appropriate the idle speed required. I have heard the best is to Spray 99% pure isopropyl alcohol (available at electronic stores) onto the wires to clean and shake dry. Be careful not to use other solvents as they may damage the sensor. The MAF sensor also incorporates the intake ambient air temperature sensor so it’s a good time to also give that a quick wipe with cotton which is soaked in the above liquid air spray.

gx470_05

Thanks mann777

I'll work on this once I find some 99% pure isopropyl alcohol.

ARK07

The last time I did MAF cleaning (not on my Lexus though) I put it in a plastic zip lock bag (large size) with part of bottle of Isopropyl, available at drug stores, and sloshed it back and forth for a while, drain and washed again till the fluid looked clean. Again you need air dry before re-assembling.