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- Mazda Protege 5
It was bad coil packs in my case but if you have already changed those and the spark plugs and the wires then you can rule that out. Have you checked your air intake for any leaks? Dont bother cleaning EGR it will just give you the same problems a month or so down the road. As far as resetting the EGR you can do that i also heard disconnect the battery and then pump the brakes five times or so to drain any power left in the system.