Hyundai Sonata 1991 Shop Manual page 224

EXHAUST EMISSION CONTROL SYSTEM
EGR Valve
1. Removethe EGR valve and check it for sticking. carbon depos-
its, etc.
If such conditions exist, clean with solvent to ensure tight
valve seat contact.
2. Connect a vacuum pump to the EGR valve.
3. Apply a vacuum of 67 kPa (19.6 in.Hg) and check that
vacuum is held.
4. Blow in air from one passage of the EGR and check as
follows.
Vacuum Normal condition
6 kPa (1.7 in.Hg) or less Air does not blow through
26 kPa (7.5 in.Hg) or more Air blows through
NOTE
When installing the EGR
valve. use a
new gasket
and
tighten to the
specified torque.
Tightening torque
EGR~I~
.
19-27 Nm (190-280 kg.cm. 14-20 Ib.lt)
EGR Temperature Sensor (California Vehicles Only)
29Y()41
1. Place the EGR temperature sensor in water. and then
measure the resistance value between terminals 1 and 2
while increasing the water temperature.
If out of specification, replace the EGR temperature sensor.
Temperature °C (OF)
50 (122)
100 (212)
Resistance (Kn)
60-83
11-14
.......
2
if
50n5\1_
CJ
____'Y____ -
.
(§)
-
- - -
- -
-
-
~
,
29Y089
Tightening torque
EGR temperature sensor
............... 10-12 Nm (100-120 kg.cm, 7.3-8.6Ibft)
29-19