Review on ACDelco 213 4338 Original Equipment Sensor by Bob Randles

The original MAF sensor (200,000+ miles) tripped the check engine light and caused the engine to overshoot slightly at start. Other than that it worked fine. I bought and installed a mass air flow meter from a well known auto parts store with a lifetime warranty. When idling, the engine hummed so loudly that it stopped even before the gear was engaged. The check engine light did not come on. Returned it and went to another competitor aftermarket store and bought another MAF sensor with lifetime warranty. The engine started and ran well even in cold weather. However, after warming up, the engine stalled when the accelerator pedal was released. He didn't turn on the check engine light. Returned it and bought a Delco OEM AC Mass Air Flow Sensor. Installed and the engine starts and runs amazingly well (again). I am very comfortable!