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.