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  1. Surging at 35-40mph?

    DTC's, Problems & Troubleshooting
    Like the title says, my car is surging between 35-40mph ONLY, and I have no idea why. I did a few things before this started happening and I don't know which could have caused it (if any). Basically, I redid all but the head gaskets, cleaned out the throttle body, ran some Seafoam spray through...
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