I have a 2002 Sonata 2.4L, 105K miles on the clock.
Engine starts with differculty, say 8 sec cranking of engine rather than the normal 2Secs. About once per week engine check light comes on, I clear it by disconnecting -v terminal of the battery.
At 36K miles, the Purge Control Solenoid Valve(PCSV) was replaced, for a engine light coming on.
It has new battery, new plat plugs. Still gets 30mpg. But starting is a pain.
Anyway, where is the PCSV, Webtech drawings are very poor.