just need some suggestions. everytime im driving my car, when the engine warms up a bit, i loose power, like when i acceleratethe rpm increase very slow.i thought it could be my catalyzer, but i changed it, also my manifold glows red from heat as if i was pushing the car to the limit. its a 2.0 16 valve engine

 

It's either clogged, or just change the coil. I had a problem like that on my 2.8 and I changed the coil pack and it runs great.

 

the manifold might be cloged? cause when i went to change the catalyzer, the guy started the car without anythingafter the downpipe and the car was reving good?