Walker Products new mass airflow (MAF) Sensors are designed to provide the vehicle's Powertrain Control Module (PCM) with precise information regarding how much air is entering the engine, which guarantees ideal engine performance. Walker has been an automotive industry leader in providing high quality fuel system components since 1946.
Check for Vacuum Leaks First!
Vacuum leaks present symptoms similar to a faulty MAF Sensor. When replacing the MAF, always check for vacuum leaks, too. Common sources include:
Leaking Intake Manifold Gasket (found in the "Engine" category) - Vacuum Gauge readings below 17-22 in-Hg (normal manifold vacuum at sea level) at idle may indicate an intake manifold gasket leak.
Note: As elevation increases, readings decrease. Subtract 1 in-Hg from normal manifold vacuum reference for every 1,000 feet increase in elevation above 2,000 feet.
Stuck open PCV Valve - remove the PCV Valve and gently shake it; if it does not rattle, the valve is clogged or dirty and should be replaced.
Cracked Intake Boot (found in the "Engine" category)
Videos
Cleaning Your MAF Sensor
How to Install a MAF Sensor
Walker Products Mass Air Flow Sensor Diagnostics
Additional Resources
RockAuto Newsletter: Maintaining the Optimal Air/Fuel Mixture Attention California Customers - WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. www.p65warnings.ca.gov
CAPA Certified or NSF Certified parts bear the seal of independent, third party organizations guaranteeing fitment and quality equal to original equipment. These parts may be required if your insurance company is paying for the repair.
Check for Vacuum Leaks First!
Videos
Additional Resources
RockAuto Newsletter: Maintaining the Optimal Air/Fuel Mixture