Hyundai Sonata 1991 Shop Manual page 208

TROUBLESHOOTING
GENERAL
Y29CEOA
Symptom
Probable cause
Remedy
Engine will not start or hard
Vacuum hose disconnected or damaged Repair or replace
to start
The EGR valve is not closed Repair or replace
Malfunction of the purge control Repair or replace
solenoid valve
Rough idle or engine stalls
The EGR valve is not closed Repair or replace
Vacuum hose disconnected or damaged
Repair or replace
Malfunction of the PCV valve Replace
Malfunction of the purge control system
Check the system; if there is a pro-
blem, check its component parts
Engine hesitates or poor Malfunction of the exhaust gas recircula-
Check the system; if there is a pro-
acceleration tion system blem, check its component parts
Excessive oil
consumption
Positive crankcase ventilation line
Check positive crankcase venti la-
clogged
tion system
Poor fuel mileage Malfunction of the exhaust gas recircula-
Check the system; if there is a pro-
tion system
blem, check its component parts
29-3