4-25
E
FUEL
3. Remove:
• Throttle bodies
• Air filter case
4. Remove:
• Carburetor synchronizer or vacuum
gauge
5. Install:
• Plugs
6. Install:
• Air filter case
• Throttle bodies
Vacuum pressure at trolling
speed:
Cylinder
Cylinder
difference
Example
#1
–30
±
10 mmHg
(–4.00
±
1.33 kPa,
–1.2
±
0.4 inHg)
–210
±
10 mmHg
(–27.99
±
1.33 kPa,
–8.3
±
0.4 inHg)
#2
Standard*0
–180 mmHg
(–23.99 kPa,
–7.1 inHg)
#3
0
±
10 mmHg
(0
±
1.33 kPa,
0
±
0.4 inHg)
–180
±
10 mmHg
(–23.99
±
1.33 kPa,
–7.1
±
0.4 inHg)
#4
–20
±
10 mmHg
(–2.67
±
1.33 kPa,
–0.8
±
0.4 inHg)
–200
±
10 mmHg
(–26.66
±
1.33 kPa,
–7.8
±
0.4 inHg)
Standard*: When setting the specified
engine speed, the value is zero.
NOTE:
Always maintain the specified trolling speed
when making this adjustment.
s. Measure the throttle position sensor out-
put voltage. Adjust the throttle position
sensor
A
position if out of specification.
Throttle position sensor output
voltage:
Pink (P) – Black/Orange (B/O)
0.760
±
0.016 V
FUEL INJECTION SYSTEM
