Join Date: Sep 2008
Location: Fruitland Park,Florida
Welcome to the forum.
1st thing you need to do is go to following link & download 95 service manual. It will have driveability & emissions section that can help you.
2nd thing is for you to get an obd 1 scanner that does real time sensor data. Hook car to scanner & read codes. Then do a running sensor scan. See what sensors are saying.
Don't have a clue to what sensor data means. PM me with your email address. I'll send you the pdf file "scanner readings and what they mean".
Next, put a fuel pressure gauge on fuel rail. @ key on prime pressure should be around 43 psi. Start engine, @ idle pressure should be at least mid 30's. Tape gauge to windshield, take a drive. Pressure for all driving conditions except idle should be around 40 psi.
Being a lt1 owner you need to have an oscilloscope to test opti low & high resolution signals. You can buy a pc based scope on ebay, amazon, etc for around $70. Test your low & high res signals being sent out by opti. Make sure they are the proper square wave. Also, no drop outs of signal, & no changes to waveform when engine acts up.
All this should keep you busy for a while. Report your findings when testing is done. We're go from there.