OK, so I've dug a little deeper to try and get this resolved. Here'* some diagnosis steps as recommended by the '97 FSM. These are basic and should not be any different for your '96. In order of listing:
- Check your Heated Oxygen (O2) Sensors. Since you don't have a scantool to check the response times, pull the rear manifold one and look for a white powdery coating (silicone contamination). This contamination can cause a false rich condition signal and cause the PCM to reduce fuel delivery, causing severe driveability problems.
- Check your TPS (Throttle Position Sensor) and related wiring
- Check the MAF Sensor and related wiring. Clean MAF sensor carefully with some alcohol and a cotton swab if dirty.
- Check the EGR valve for a sticking pintle.
- Check the fuel pressure
There'* more, but this is a bunch to do for now.
Mike: 1997 SE w/ 183K, aka White Horse
, Gutted Airbox w/K&N, drilled 180* t-stat, tint all around, clear corners w/SilverStars, "PONTIAC" light up tail, PEMs, NGK TR55s