i have a 98 camaro, and when it's idleing it is like its shaking but its more like an intense vibration and does it up until like 2500 rpm, and i have lost alot of my power after than its fine, but still doesnt have very much power... also every now and then it like jumps as if its trying to die while im driving. also it has a brand new air filter and cat... its got a rebuilt motor put in it last week and ran like a scalded cat up until yesterday and it started acting up... PLEASE HELP

 

The shaking sounds like a motor or trans mount was left un tightened or is falling apart.

 

but that dont explain the incredible loss of power... its like it missing but not choppy missing.... i had a coil go out and its nothing like that so idk

 

Your engine is misfiring, check your ignition system and fuel delivery.

 

i just changed the fuel filter and it looked like coffe pouring out of there, that helped but didnt fix it and i know its misfiring but its not throwing a code and everything there is brand new... imma tinker with it tomorow its 31 degrees and thats way to cold to mess with this crap in east texas...

 

If you poured coffee out of the filter you may have a clogged up internal tank filter. These are also called fuel tank socks. This is a prefilter that is there to protect the pump, the other filter is there to protect the rest of the fuel system.

Massey

 

agree with massey and pete, your fuel pressure may not be enough to run the motor properly. check your fuel pressure while running and not, may give you and idea of whats goin on.

 

i replaces two coils so far, when both other ones went out the car would jump and buck when giving it gas and the idle was really jumpy... turns out the third and final coil went out and i replaced all of them today with MSD coils to match the wires... the car idleed smooth, its was just shaking and it just felt like it wasn't getting enough air... never seen one run soo good and halfway smooth on only 4 cylanders working. none the less i changed the fuel filter after 114,000 miles on the stock one and used a wix filter... made an amazing amount of power difference. the only thing left is to replace the cooling fan relay and im in the clear FOR NOW.