Today I sprayed off the engine, with water of course of my 1994 corvette, drove it 20 miles and stalled the engine at a light. engine would night refire. let it sit for 20 minutes then it fired. Iwas able to get it back home but it will not run without back firing. Prior to today it ran like a top. Have any idea what to try. Thanks Leo

You will have dry all ignition components ... You have a distributor that you can open? Get a drying agent from your auto parts store (spray can) and spray all high voltage wires. Next sunny day, roll the Vette into the sun and leave the hood open all day.

Wet ignition wires may be the cause. Try drying them off, or if they are old, replace them. If you have a distributor, open it and check for moisture in the cap. Dry out any moisture.

Remove the distributor cap. (leave the wires on)
Check the inside of the distributor cap for moisture. When you washed the engine, some water may have condensed on the inside of the distributor cap. It's a pain, but not really a problem. Let it dry for a few hours and see how it does.