Cold Enrichment System
- Apply parking brake and block drive wheels. Remove air cleaner. Plug vacuum hose(s) to air cleaner. With choke cap cool to touch, turn ignition to "Run" position (without starting engine) for 2 minutes. Choke cap should not become warm.
- Start engine when cold enrichment rod is up and fast idle cam is freed from fast idle lever. Run engine no longer than 3 minutes. Cold enrichment rod should seat. Turn engine off.
- Manually set fast idle lever on specified step of cam (refer to Emission Decal in engine compartment), count high step of cam as first step. Start engine and warm to normal operating temperature. Open throttle and check that cam falls freely to full off position. If system is operating properly, engine speed should drop a great amount when throttle is released. Turn engine off.
- Check vacuum hoses, solenoids and electrical wiring for proper connections. Ensure carburetor hold down nuts are tight. Check carburetor linkages for freedom of operation. If binding exists, proceed to step 5 ). If no binding exists, perform ELECTRIC CHOKE TEST .
- Check for damaged, missing and/or misaligned parts. Check for dirt, grease or other material on moving parts. Service as required. If linkage is serviced or replaced, check choke adjustments.
- Remove choke control rod-to-choke shaft lever retaining clip and disengage linkage from lever. Open throttle slightly and check choke shaft lever for freedom of movement. The choke cap and pulldown diaphragm return spring should provide only resistance. Choke shaft lever should spring back to original position. If not, clean or service as required.
- Manually move choke control rod up and down. Movement should be free. If not, remove CER lever pivot pin retaining clip. Remove pivot pin from lever. Carefully lift lever up and out of upper body as far as linkage will allow. Remove CER and check for dirt, distortion or damage. Clean and service as required.
- Reinstall parts and ensure free movement. Perform CER adjustment. If cam movement is still not free, overhaul carburetor. If movement is free, reinstall choke control rod to choke shaft lever with retaining clip and reinstall air cleaner.