Exhaust Sulfer Smell; High Oil Consumption - Mazda MX-5 1990 Workshop Manual

TROUBLESHOOTING GUIDE
29
I
EXHAUST SULFER SMELL
DESCR'P-l.
Exhaust gas smells abnormal (Rotten egg smell)
TION
[TROUBLESHOOTING HINTS]
High suiter content fuel used
STEPi
INSPECTION
1
1
I
Change fuel to another brand
30 HIGH OIL CONSUMPTION
[TROUBLESHOOTING HINTS]
CD pev
system malfunction
@ Engine malfunction (Oil working up, working down, or leakage)
STEP INSPECTION
Check if PCV hose, ventilation hose
or
their at-
taching nipples are separated, damaged,
clogged, or restricted
c::::r page F-117
2 Check if air pressure or oil is present at ventila-
tion hose
3 Check if vacuum is felt at PCV valve at idle
Yes Repair or replace
No Go to next step
Yes Go to next step
No Check engine condition
• Oil leakage
• Worn valve seal
• Worn valve stem
• Worn valve guide
Yes Check engine condition
ACTION
ACTION
c:::T
page F-117
• Worn piston ring groove
• Stuck piston ring
• Worn piston or cylinder
No Replace PCV valve
F
05UOFX-046
c::::r page F-117
c::::r page
B-3
c::?
page 13-3
c::?
page F-117
05UOFX-047
F-69