hi im new to this site but im actually here for my friend who is having trouble with his cavalier.some problems that he is havng is that its missing when he goes to drive it and has no power going up any hills.he has replaced all wires,spark plugs and filters.any suggestions would help.

 

try the idle air control
no pwer up hills maybe egr related
its hard to diag over the puter
give us some more history on the car

good luck