so im new to the 240 world but have worked on cars most of my life.
i have a 1992 240sx with a stock KA. put on a K&N filter kit and cat-back exhaust kit (stock headers).
not too long after i bought the car, i noticed a tick. with my experience, i'm pretty sure its a valve tick and am not too worried about it, but this is one thing i am curious about being a problem down the road!
now for the biggie: after i put the exhaust on, i noticed the car running a little rich and rough. i dont know weather to advance or retard the timing (question number one) and if this is the cause of the rough idle or not (question two)
when the car runs rough, its only at idle, which leads me to think vacuum leak but dont know where to start on that adventure...and to be honest, think it might be a head gasket, except for the fact that it runs fine once its given gas and uses NO coolant.
last question! it does burn some oil so i dropped 10w40 and some Lucas in it and it quit for the most part but still does it when its cold outside (below 50). any suggestions??
ANY HELP WOULD BE GREATLY APPRECIATED AND GLADLY TAKEN!!
if you are near the Athens area and can help, PLEASE do...this is my daily driver and am about to have to drive it to Las Vegas as i am moving!!