95 LT1 ,CHANGED OPTI ,PUT CAR BACK TOGETHER, STARTED RIGHT UP . WHEN I TOOK IT FOR A CRUISE IT JUST SHUT DOWN, WHILE I WAS RUNNIG ABOUT 20 MPH, SO I ENGAGED THE CLUTCH AND HIT THE KEY . CAR FIRED RIGHT UP , RAN GOOD AFTER . LEAVE FOR WORK IT DOES THE SAME THING 2 MORE TIMES . NOW THE CAR WONT START JUST SPIN. HOW DO I CHANGE THE PLUG ? COMPLETE HARNESS?? SEEMS LIKE SOMEONE FLIPD A SWITCH AND IT SHUT DOWN . SHOULD I TRY ANOTHER OPTI? HOW DO I CHECK FUEL
PRESSURE, FUEL PUMP IS ON W/ KEY.


URE WOULD APPRECIATE ANY INPUT... THANKS


SOON !!

 

Loose harness on the opti? Bad coil maybe? Try seeing if you're getting fire. Ground the plugs and see if they spark but be careful. You can check your fuel pressure on the back of the fuel rail with the schrader valve. It's closer to the passenger side of the rail.