have your shop do a compression and leakdown tests. and yes, it's an interference engine so a bent valve is possible.

 

Yes my friend I'm afraid Snoopy may be right. Looks like you may have a few bent valves. My 94' broke a timming belt on the Interstate @ about 80 MPH with 194,000 miles. Way past the recomended 90,000 mile timming belt change limit. I coasted to the side thinking "OH s_ _ _ ". Towed it home and started doing a comperssion check. #1, 180psi; #2, 0psi; #3, 180psi; and #4, 80psi; Thought I could get by with just replacing the timming belts and water pump. I completed the job and started the engine, it ran like crap. I pulled the head and found 4 bent exhaust valves on #2 and #4. Yes the
F22B engine is a 0 tolerance engine. If you have only 2 bent valves you are lucky. I can't believe your repair shop sent it back to you running rough, knowing or not knowing you could have bent some valves. I would take it to another repair shop next time. Good Luck! and beware!

 

my 2001 honda civic shakes on idle too but when i run it its smooth what cud be the problem is the idle control screw and where cud i find it :S

 

check ur motor mounts. a bent valve or rod will messup through out the rpm range, not just at idle.

it could also be ur idle control. its on the throttle body on the right side of throttle. ususally there's a little cover on top of it and when up pop that cover off, theres a flat head bolt in there that u can turn and reset ur idle