Hello everyone, I tried to post my question in the tech forum but I cant for some reason. So please forgive me for posting it here. My car is a 98 civic lx 4dr D16Y7 My check engine light came on and the scanner says its a P1399. My car does not have an egr valve so Im not sure what to check next, the valve lash or distributor? Car has 156k on the stock timing belt,dist,water pump. I changed the cap rotor plugs and wires reset the code and drove for 2 days now its back ?? Please help