Engine Mechanical problem
2000 Mazda MPV 6 cyl Front Wheel Drive Automatic 76,000 miles

There is a noise coming from my air cleaner when I ease off the accelerator pedal. The best way to describe the noise is a woof-woof-woof or a rapid pop-pop-popping sound. I know it is affecting my gas mileage. I believe it may be coming from the air system. BUT, I reside in the Philippines and, if you can believe this, the Mazda dealer in Manila does NOT have a vacuum tester that can troubleshoot my vehicle. It does affect my engine performance. The plugs are good and the wires are good. I am at a loss as to where to start. I cannot depend on vehicle mechanics here especially if a major auto dealership in the capital city does not have or know what a vacuum tester is. My vehicle was imported from California and is not a local version.
Thanks for any assistance regarding this matter. Iam afraid my wife may crucify me if we get stuck on the road.[/align][/align]I also have O2 sensors not functioning on the catalytic converter but that should not be the problem.
Thanks again[/align]