CARBURETOR - Idle Speed and Mixture Ratio (Models with catalyzer without E.G.R.) (Cont'd)
EF & EC-158flowchartIdle speed differs by transmission: M/T 750±50 rpm, A/T 850±50 rpm in "N".
Idle Speed and Mixture Ratio (Models with catalyzer without E.G.R.) (Cont'd)
1
(D) connector from previous page
2
Does engine run smoothly?
YES
return to step 6
NO
3
Check the following. • Vacuum hoses for proper connections • Air leaks at carburetor mounting and intake manifold
O.K.
return to step 6
N.G.
4
Correct or replace malfunctioning parts.
5
Adjust idle mixture ratio by turning idle adjusting screw until idle "CO" 1.0±0.5% is obtained at test-take off tube and install idle mixture seal plug. (Refer to Idle Mixture Adjusting Procedure.)
N.G.
Correct or replace carburetor.
Correct or replace carburetor.
Adjust idle mixture ratio by turning idle adjusting screw until idle "CO" 1.0±0.5% is obtained at test-take off tube and install idle mixture seal plug. (Refer to Idle Mixture Adjusting Procedure.)
O.K.
6
Turn off engine and connect exhaust gas sensor harness connector. Also reconnect idle compensator vacuum hose to vacuum connector.
Disconnect idle compensator vacuum hose from vacuum connector on intake manifold and install suitable blind cap to vacuum connector. Check idle CO % (at test-take off) IDLE "CO" % 0.5 - 2.0 %
Disconnect idle compensator vacuum hose from vacuum connector on intake manifold and install suitable blind cap to vacuum connector. Check idle CO % (at test-take off) IDLE "CO" % 0.5 - 2.0 %
7
Disconnect "CO"-meter probe and install cap on test-take off rube.
8
Start engine.
9
Race engine (2,000 to 3,000 rpm) 2 or 3 times under no-load, and run engine at idle speed.
10
Check idle speed. IDLE SPEED: M/T: 750±50 rpm A/T: 850±50 rpm (in "N" position)
O.K.
END
N.G.
11
Adjust idle speed by turning throttle adjusting screw. IDLE SPEED: M/T: 750±50 rpm A/T: 850±50 rpm (in "N" position)
12
(G) (on previous page)
See also
Idle Mixture Adjusting Procedure