test your tps. i had a simliar problem on a 86 N/A changed tps and it stopped lurching all weird
http://www.cygnusx1.net/Supra/Librar...ction=FI&P=100
have you pulled any codes??
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1984 supra - 1uzfe - w58 - 4.10 - 1 piece aluminum shaft.
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