i have the same problems but not quite as bad , when mine drops in idle it usually keeps itself from dieing. i replaced my idle speed control solenoid and it fixed it for awhile , but its goin to shit again. mine always shows code55
afm is on the same side of throttlre body as tps right? and its like kind mounted behind the tps? id like to try doin this to mine. my problem is similar except i have no problem gettin to 70 mph , but the car does surge and its annoying as hell
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