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Thank You Jeeves P. The Best of Second City: Vol. Arcadia Tom Stoppard. Fuel pump gasket s worn out. Rebuild fuel pump. Air in fuel line. A dirty or clogged fuel filter. Clean or replace fuel filter. The fuel pickup in fuel tank clogged or dirty. Clean or replace pickup.
Worn out fuel pump diaphragm. Defective hole or crack check valve s in fuel pump unlikely. Broken check valve retainer. Pulse hole plugged. Remove fuel pump and clean out hole. Replace pulse hose. Loose pulse hose. Tighten connection. Boost diaphragm gasket distorted or out of place. Align or replace gasket if necessary. Fuel Pump Components Design 1 NOTE: In fuel pump reassembly, remember that respective diaphragms go against the mating surfaces of the fuel pump body, and respective gaskets are between the diaphragms and end caps.
Gaskets should always be replaced on fuel pump assembly. Carburetion Fuel System Troubleshooting Troubles, that are caused by items 1-thru-5, listed below, may give the impression that a problem exists in the fuel system: 1. Spark plugs 2. Ignition spark voltage 3. Cylinder compression 4. Reed valves 5. Ignition timing Troubleshooting Charts. Check fuel in fuel tank and replace or add. Fuel tank air vent closed or restricted. Air vent must be open and free from contaminants.
A pinched or restricted fuel line. Check, and replace as needed. Dirty or restricted fuel filter. Check, replace or clean. Enrichener valve not operating. Check enrichener system. An inlet needle in carburetor that is stuck open or closed. A needle stuck open, will cause a flooding condition. A needle stuck closed, will prevent fuel from entering carburetor. Remove, clean, or replace. Anti-Siphon valve restricting fuel flow.
Flush out inlet seat and clean inlet needle. Worn inlet needle. Punctured float. Incorrect float setting. Reset float. Air leaks past mixing chamber cover. Tighten bolts securely. Tighten cover or replace gasket. Fuel level too low. Reset float level. Clogged high speed jet. Check and clean. Restricted fuel flow to carburetor.
Check fuel lines and filter s for restricted flow. Incorrect high speed jet. Refer to main jet chart and replace with proper jet. Idle mixture set too lean. Adjust to run richener. Air leakage into fuel system. Check fuel line connections, hose clamps, fuel pump, and fuel outlet tube located in fuel tank for loose fittings.
Reset float to correct level. Carburetor floods. Blow out with compressed air. Restricted air flow.
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