Hyundai Sonata 1991 Shop Manual page 235

GENERAL
PROBLEM
Rough idle or engine stalls
Trouble codes
o Using voltmeter
[Refer to page 31-41]
o Using MUT [Refer to page 31-44]
o Fuel line (leakage, deformation)
o Fuses
o Fuel pump [Refer to page 31-33]
o Fuel filter
o Fuel pressure regulator
o Oil filler cap
o Oil dipstic
o Vacuum hose connections
o PCV hose
o EGR system
Idle speed-Adjust
[Refer to page 31-29]
Ignition timing-Adjust
[Refer to page 27-361
- - - - - ; ,
unction
es
-----;,
Wrong
-----;,
Wrong
- - - -;.J
Element-Clean or replace
Wrong ' - - - - - - - - - - - - - - - -
-----;,
Wrong
-----;,
Wrong
Check self-diagnosis
- -
[Refer to page 31-39]
Malf
cod
Normal codes
Check for vacuum leaks
-
OK
,II
Check fuel supply to injector
f - - - -
o Fuel in take
o Fuel pressure
[Refer to page 31-34]
OK
Check air cleaner element
-
JOK
Check idle speed
- -
Standard : 750
± 100 rpm
JiOK
Check ignition timing
- -
Basic : 5°
±
2°BTDC at curb idle
Actual : 10
0
BTDC
\1
OK
Check spark plugs
Standard : 1.0-1.1 mm (0.039-0.043 in.)
o Check compression and valve clearance if
necessary
o Compression
Limit: 10.5 kg/cm' (1050 Kpa, 150 psi)
[250-400 rpm]
OK
,II
To be continued
31-10