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Evaporative Emission {EVAPI Two Way Valve Tosting
2 .
Remove the fuelfill cap.
R e m o v e t h e v a p o r l i n e f r o m t h e E V A P t w o w a y
valve, and connect it ro a T-fitting from a vacuum
gauge ano a vacuum pump as shown.
VACUUM/PRESSURE
1 .
GAUGE
0 - a i n , H g
VACUUM PUMP/
GAUGE,0 - 30 in.tlg
A973X - 041 -
xxxxx
i /
N
I
t /
i l \ /
1il|
07JAZ - 001(X)08
3.
Apply vacuum slowly and continuously while watch-
ing the gauge. The vacuum should stabilize momen-
tarily at 0.8 - 2.1 kPa (6 - 16 mmHg, 0.2 - 0.6 in.Hg).
l f t h e v a c u u m s t a b i l i z e s { v a l v e o p e n s ) b e l o w
0 . 8 k P a ( 6 m m H g , 0 . 2 i n . H g ) o r a b o v e 2 . 1 k P a
(16'mmHg,0.6 in.Hg), install a new valve and retest.
4.
Move the vacuum oumo hose from the vacuum fit-
ting to the pressure fining, and move the vacuum
gauge hose from the vacuum side to the pressure
side as shown.
PRESSURE
stoE
Slowly pressurize the vapor line while watching the
gauge. The pressure should be stabilize momentarily
above 1.0 kPa (8 mmHg, 0.3 in.Hg).
l f t h e p r e s s u r e m o m e n t a r i l y s t a b i l i z e s ( v a l v e
o p e n s ) a b o v e ' 1 . 0 k P a ( 8 m m H g . 0 . 3 i n . H g ) , t h e
valve is OK.
lf the pressure stabilizes below 1.0 kPa {8 mmHg,
0.3 in.Hg), install a new valve and retest.
T.FMING
1 1 - 1 5 1
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Troubleshooting
