every time i hit 3,000-3,500 rpm there is strange noise in the engine pop up (only at this rpm range) what cause this problem? any help would appreciate.

 

Clogged up cat / header bolts would be my guess.

 

what kinda strange noise are you talking about.... i have one that i still havent figured out.... its kinda like a loud constant ticking between 2-3500 rpms i duno if its really a rattle..... sounds like its coming from the engine? anyone know?

 

mine, sound the same as you said, i don't have a clude. let me know if you find out the problem. thanks

 

mine did the same thing my answer is get your valves checked and while thats getting done u should just get ur valves adjusted and a new timing belt.

 

put the car on jack stands and have someone drive it while u peek around and listen 4 the noise

 

i got my valves adjusted awhile back and its still been doing that?

 

That is VTACH kicking in!!!! Love it!