So i recently bought a clean 1992 sc400 for a low low price of $700 talk about a steal i brought it home no problems but this morning i cranked it and idleing would bounce from 2000 rpms down to 1000 rpms and back up again it had recently been rebuilt and i wondering if the fella knew what he was doing ive read and found out it could be the iacv, or the tps sensor is their a certain way to put the tps sensor on? Like a certain installation method?

 

Bump not the iacv any help

 

It was a bad mass air flow sensor and a bad tps

 

Parts have been discontinued for years. Looking for used ones with lowest miles possible.

310-678-6499
Brad