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V31DMOA
MPI
SYSTEM
Throttle Body (Throttle Valve Area) Cleaning
NOTE
Disconnect the air intake hose from the throttle body, and
check the throttle valve surface for carbon deposits, rotating
the valve. Apply the spray cleaning solvent on the valve to
remove carbon deposits.
1.
Warm up the engine, then stop it.
2.
Remove the air intake hose from the throttle body.
3.
Spray cleaning solvent into the lIalve through the throttle
body intake port and leave it for about 5 minutes.
4.
Start the engine, race it several times and idle it for about
1 minute.
NOTE:
If the idling speed becomes unstable (or if the engine
stalls), slightly open the throttle valve to keep the engine
running.
5.
Repeat steps 3 and 4.
6.
Attach the air intake hose.
7.
Adjust the idle speed control and throttle position sensor.
1.
Reduce the internal pressure of the fuel pipes and hoses mak-
ing the following operations.
o
Disconnect the fuel pump harness connector at the fuel
tank rear side.
o
Start the engine and after it stops by itself, turn the igni-
tion switch to OFF.
o
Disconnect the battery negative (-) terminal.
o
Connect the fuel pump harness connector.
Fuel Filter Replacement
V310NOA
2.
Remove the eye bolts while holding the fuel filter nuts
securely.
3.
Remove the fuel filter mounting bolts, then remove the fuel
filter from the fuel filter clamp.
31-32
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