Is it comen for are camaros to run alittle rough on start up when car is cold and outside temp is 40-50, My car runs like this on start up. starting in the summer time or if the car is hot doesnt run rough. also my car always had a rough spot at 2100 free reving car has 122,000 on it. any replys thanxs!!!!

 

Shouldn't be rough at all with a relatively stock setup.

 

I CANT FIGURE IT OUT i have done every thing from plugs to opti, about the only thing i have left is injectors( but i still dont think its those). plus its not like it shake the car, small shake in the seat, pedals and streeting wheel

 

If it's a small vibration, not a running rough condition, it's common to have a harmonic point in the exhaust where you'll get a vibration only at a certain point. I have this in my setup at 2K rpms.

 

i guess you are right to say that its not a big vibration but a small vibration, like hermonics or some thing.