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If your maf fails the resistance test, I would replace it with a brand new oem maf. My engine started vibrating. You could feel it through the steering wheel. I changed the timing belt, valve cover gaskets, motor mounts, transmission mounts, and exhuast mounts. There was still a faint vibration. Changed spark plugs, wires, and pcv. Still there. It was driving me crazy and I thought it might have been the injectors. Turned out it was the remanufactured maf I bought from Autozone. I was chasing the small miss for a year and it was the damn Autozone maf! Checked the resistance and it was out of spec. Of course I figured this out 1 month after the warranty ended. Bought a new oem maf and car no longer vibrates.