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  1. Advice? P0305, P0134, P1420

    Problems and Troubleshooting
    I replaced the EGR valve on my 2002 MT Insight about 6 months ago. I made the replacement because it never seemed to be going into lean burn and my gas mileage was dipping into the upper 30s, although that was mostly in town driving. My MPG went up somewhat after that back into the upper 40s and...