i did a search but came up empty,
well my rpm's are steady at 600, im sure i read that on here somewhere thats where there supposed to be, but when i sit in drive it stays at 600 but i feel like the engine is shaking not like the misfire i had but slightly everything is working fine but what could it be? engine mounts going bad?
alternator? i did notice my windows go up slower when im sitting at a stop sign.
next is somedays when i start it up after a few hours of not driving my oil light will flash twice, i have checked an changed my synthetic oil 3000 miles or less(i baby my car)

any help would be super thanks

 

If you think it's the alt, put a voltmeter on the battery while it's running and make sure you are getting over 12 volts (can't remember the exact number).

 

Sounds like age, perhaps. You might have some very light misfiring at idle. I'd try the simple things first - try running some fuel injector cleaner through it, then maybe check the plugs - they may be getting close to needing a change. If it's just a little vibration, it's probably nothing to worry about.
Alternator and engine mounts won't make your car shake at idle.

 

Try cleaning your MAF, check plugs and like said above some injector cleaner.

 

i have new spark plugs and all origanal(lol) coil packs but the one i replaced, so maybe bad injectors? i will have to check the other 3 under the cover in the engine, what are some good places to buy parts online?

 

Does the car seem to perform OK other than at idle? Do the easy stuff first.....leave the injectors for now. I think 600 RPM is too low idling in gear. In P or N it should idle at 650 to 750 (warmed up) and it might momentarily droop but I think it should recover quickly when you pop it in D. Has the SES light ever come on? Battery light is always OFF with the engine running? How old is the battery? I think it has a miss at idle at least, which is the reason for the vibration and the low idle RPM. An auto VQ30 normally cannot be felt idling. I'd bet on another coil going duff, but as suggested first check that the battery voltage is over 13 volts with the engine running at about 1000 RPM plus (not at your 600 RPM idle). If it's not close to that then the alternator output is low and your battery is probably not fully charged. If the alternator output appears OK then check that the battery voltage with the ignition OFF is about 12.5 volts. If it's less than, lets say, 12 volts then the battery is probably duff. Low battery voltage with these cars can cause problems.