the car was starting at first then i change the tb, thermostat, and the egr valve pipe..... now its not starting i took out the spark plug and its not getting any spark.... any ideas??????

 

well my friend when you changed the thermostat.... did coolant come and fall diown below? i would believe so and ur dripping coolant all over your optispark and looks like your gonna have to do the dreaded optispark change

 

look around the areas around the opti and anywhere near it for dried up coolant trails or drops etc

 

Suggestions:

-add a "signature" with basic info about your car - year, model, engine, trans, and major mods. Not all years of the LT1 are the same. Makes it easier for people to give you accurate answers.

-get it scanned.