Hello all, I have a 97 non vtech civic and need some advice. About a week ago it started to idle really rough and would be even worse in the AM when cold, but seems to run fine at higher speeds. Check engine light came about a day later. pulled CEL codes, cylinder misfires and a P1399 valve clearance,possible blocked EGR? I cant seem to find the EGR valve or if this is even the problem. Any suggestions would be appreciated. Thanks!