i have a 99 blazer 4x4 and recently ive been hearing a ticking noise coming from the the right side of the engine, and my thought that it was the exhaust manifold. but my buddy he has an 04 and he said its the cat, could that me right.

with the no power , u pretty much have to floor it to make it get up a go any were.

99 blazer w/ cold intake recently done a tune up; ac delco platuim plugs and bosch wire and cap and rotor and pcv valve for the heck of it

other question doing 50-60 mph should the rpm be around 2500 rpms?

thanks

 

and im running royal purple 5w-30 synthic oil