Bit of a Rough Idle, Now its knocking at low rpm's Options

[96stgreendemon]

The other day noticed my car starting to idle to idle a little funny, sounded almost like a boxer engine at idle.
thought it may be my plugs, they were only about 6 mo old.
i was using 10w30 instead of 5w30 so thought it could be that.
So friday i Seafoamed the car, then changed the oil and the plugs
Runs great now, but the CEL came on the other day, read it as EGR code, had it deleted and it hasnt come back
but my idle is a little weird now, seems like it is idleing a little lower than normal but smoother, has a little bit of a shake too it though, thoughts anyone?

This post has been edited by 96stgreendemon: Nov 23, 2010 - 9:38 AM

[96stgreendemon]

I just started to run 10w30 in august, was using 5w30 before, and i went back to 5w30 the other day so it would be a little easier on the engine when it was colder out. the spark plugs were just wrecked when i took them out, they were all coated in black build up, spacing was at .20 when it should of been at .32, all gummed up etc, wires are about 6 months old along with the plugs, so im at a loss
also have a knock coming from seems like upper part of the engine when at low low rpms, about 500 to 1200, thinking it could be oil pump? help