Turning the idle screw up will only raise the idle temporarily. When you shut the car off and restart it, it will be down again.
Adjusting the TPS is not that easy on the SN95's. The TPS screws are halfway hidden behind the IAC. Furthermore, they are almost non adjustable. They have metal bushings in the mounting holes which makes turning them almost non-existant.
Does the car act any different whether it is cold or hot? I would check for a properly functioning EGR, and vacuum leaks. Does the idle change if you unplug the IAC? If all else fails, just find another shop that has an OBD I scanner. Anyone with experience should be able to find the problem that way. It shouldnt cost more than $60 to have someone scan it. If thats too much, maybe you could sweet talk them a 'lil.... hehehe
andy
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88 coupe
91 LX NMRA Pure Street 5120
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