Your problem is you have a 95, with the OBD-II style 16-pin ALDL connector, and an OBD-I PCM. Are you buying OBD-I scanners, with the correct adapter plug, or are you trying to use an OBD-II scanner? OBD-I scanners don't need a power supply from the ALDL connector, so its not a fuse.
Courtesy of Shoebox:
Have you checked the O2 sensors?
Have you checked the coolant temp sensor reading?
The IAC is not a "sensor". Its an "actuator" - a small stepper motor with a pintle that opens and closes to regulate the amount of idle air. It gets a commend from the PCM on what position to take, and the PCM moves the pintle to hold the correct idle speed.
94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons/CNC LT4 heads/Comp Cams custom solid roller/TH400+GearVendors OD/4.11's/Strange 12-bolt/300-shot N2O/Spohn Suspension/6-pt roll bar with integrated SFC's/full AutoMeter instrumentation/MoTeC M48 Pro engine management system/a few other odds 'n ends. 800HP/800LB-FT at the flywheel.
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