03 cavalier wont start after i changed the intake manifold gasket
 

car ran before i changed the gaskets on the intake manifold clean everything with carb cleaner put it all back together and now it will not start could the carb cleaner have killed one of the sensors i need help its got 2.2 eco tec

change the mass airflow sensor and still nothing

You may not have the distributor phased correctly because these engines have the "firing order corrected" distributor cap on them.

i just took off the intake manifold thats all is there something in the intake manifold that can mess that up ?

What is the engine missing? Fuel or spark?

03 ecotec doesn't have a MAF or a distributor. Everything plugged back in? If you soaked it with carb cleaner, it may take a while to dissipate or may have fouled the plugs.