Watch this automotive video tutorial to see how to clean the mass air flow sensor in a Toyota FJ Cruiser. These detailed instructions will show you exactly how to remove and clean the MAF (mass air flow) sensor in the FJ Crusier, to ensure that your engine runs at peak performance.
Removing the FJ Cruiser's MAF sensor for a visual inspection and cleaning is a simple procedure. The first step is to remove the plastic engine cover, by loosening the two nuts up front and lifting the cover off it's hinge.
Once cover is removed, the MAF is exposed in the front of the secondary air flow box. Carefully, unhook the wire harness connecting the MAF to the engine's computer. To remove the wire harness, depress the clip and give a snug pull on the sides of the connector. Do not pull on the wires. If the connector refuses to release its grip, try holding the clip down while sliding a screw driver between the connector and MAF, gently prying the two apart, careful not to apply too much force (remember plastic exposed to heat, over time can become brittle).
With the harness disconnected, remove the two screws holding the MAF in place and lift the sensor out of the the air flow box. You can cover the opening with a shop towel to prevent any dirt, bugs or stray bird poop from falling in while you clean the sensor.
With the MAF sensor removed inspect the hot wires for muck. In order to clean the hot wires we picked up "contact cleaner" from Radio Shack and following the directions, really read the directions… sprayed the hot wires with cleaner.
The contact cleaner we used drys in about 10 minutes and does not leave a film. After the cleaner has done it's job, slide the MAF back into place. You will hear a click as it seats past the O ring on the sensor's collar. Screw it into place, connect the wire harness and reattach the engine cover. Your done.
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