Engine noise and shaking at idle

[ctrigger]

My 04 rolla S shakes and i can hear my vales moving up and down at idle!!! When i first start my engine it goes up to 2,000 RPMS for a few seconds then down to like 500 Rpms and back up again and then down again to like 1500 Rpms. Then, after i drive it a bit and i stop to neutral or idle it drops to like 300-500 Rpms and shakes pretty badly like it wants to throw up or something!! My check engine light is on! I reset it and it came back again after a few hours of driving. Anyone got some tips on how to fix this? I know i could take it to the shop but it would cost way 2 much for my income.

[Wolfcastle]

My wild guess is that the cam(s?) is the causing the erratic engine speed. Hopefully not, but if so sorry, 'cause anything cam related is gonna be expensive.

[CraigW]

Out of warranty ??

[cobrajet25]

Uhhh...have you got oil in it? Sounds like an idle air bypass valve or something to me. Hondas do this alot. Regards, Aaron