ENGINE MECHANICAL - Engine Tune-up EM-7 INSPECTION AND ADJUSTMENT OF IDLE SPEED 1. WARM UP ENGINE 2. CONNECT TACHOMETER 3. INSPECT IDLE SPEED Idle speed: MIT 650 rpm AIT 750 rpm If not as spec ified, adjust accord ing to the follow ing pro cedure: CAUTION: • Always use a CO meter when adjusting the idle mix ture. It is not necessary to adjust with the idle mix ture adjusting screw in most vehicles if they are in good condition . • If a CO meter is not available and it is absolutely necessary to adjust with the idle mixture adjusting screw, use the alternative method (See page EM-9l. A. METHOD WITH CO METER 1.
VISUALLY INSPECT CARBURETOR (a) Check for loose screws or a loose mounting to the manifold. (b) Check for wear in the linkage, missing snap rings or excessive looseness in the throttle shaft. Correct any problems found . 2. INITIAL CONDITIONS (a) Air cleaner installed (b) Normal operating coolant temperature (c) Choke fully open (d) All accessories switched off (e) All vacuum lines connected (f) Ignition timing set correctly (g) Transmission in the "N " range (h) Fuel level should be about even w ith the correct level in the sight glass (j) CO meter operates normally Fuel Level ECO' 74