Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playTampering with noise control system prohibited
Federal law prohibits the following
acts or the causing there of;
The removal or rendering inoperative
by any person other
than for purposes of maintenance,
repair, or replacement,
of any device or element of
·design incorporated into any
new vehicle for the purpose of
noise ...
Fuel pump components
Fuel level gauge
Fuel pressure regulator assembly
O-ring
Joint
Fuel pump
Fuel pump case
Fuel mesh filter
10
N·m (1.0 Kgf-m, 7.0 Lbf-ft)
Apply engine oil.
Apply grease.
Do not reuse.
...
Electrical parts connector / coupler
Faulty fi system is often related to poor electrical
contact of connector/coupler. Before servicing
individual electronic part, check electrical contact of
the connector/coupler.
When connecting a connector, be sure to push it in
until a click is felt.
With a lock type coupler ...