FUEL SYSTEM AND THROTTLE BODY 5-17  The fast idle screw E is factory-adjusted at the time of delivery and therefore avoid removing or turning it unless otherwise necessary. THROTTLE BODY CLEANING  Some carburetor cleaning chemicals, especially dip-type soaking solutions, are very corrosive and must be handled carefully. Always follow the chemical manufacturer’s instructions on proper use, handling and storage. • Clean all passageways with a spray-type carburetor cleaner and blow dry with compressed air. E  L Do not use wire to clean passageways. Wire can dam- P age passageways. If the components cannot be cleaned with a spray cleaner it may be necessary to M use a dip-type cleaning solution and allow them to soak. Always follow the chemical manufacturer’s A instructions for proper use and cleaning of the throttle S body components. Do not apply carburetor cleaning chemicals to the rubber and plastic materials. INSPECTION Check following items for any damage or clogging. *O-ring * Throttle valve * Secondary throttle valve * Vacuum hose