1994 Chevy Corvette 94 vette dies

I have a 94 vette that goes dead at idle or going down the road off the gas. It is like u turned the car off while going down the road or at idle. It shows no signs of going dead before it does this. It usually does it around 1 or 2 miles from home. We have replaced distributor, idle speed motor, egr valve, and checked fuel pump pressure. It does not throw a code either. Do u think we need a new computer or any other suggestions!