OK,

So I searched around before I asked, but I think I may be stumped. My car has a cruise control issue, when my car has the cruise set above 72MPH it disengages almost right away. I replaced the brake switch, no help. I have on stock tires on 16 in stock rims. Before this problem happened I had a blowout, and my two rear tires, while the same size and pressure, are mismatched. I don't think that would cause the issue, but I am not sure. Should I be buying an amplifier next?

Thanks,

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98 E300 white/tan 220K miles