Toyota 21100-11393 CARBURETOR Assembly

Before conducting major carburetor service work, it is important to perform a thorough road test and check carburetor adjustments. Carburetor problems can cause flooding, hard starting, stalling, severe backfiring, and poor acceleration. If the carburetor is leaking fuel or covered in wet deposits, it needs attention. However, performance complaints attributed to the carburetor may actually be caused by loose or malfunctioning engine or electrical components, vacuum hose leaks, or incorrect routing. A comprehensive analysis of carburetor problems should include inspecting vacuum hoses and actuators, tightening intake manifold and carburetor mounting nuts/bolts, performing a compression test, cleaning or replacing spark plugs, checking ignition components, inspecting timing, examining the fuel pump, assessing the air cleaner's heater control valve, checking/replacing the air filter, inspecting the PCV system, checking/replacing the fuel filter, examining the exhaust system, checking EGR valve operation, ensuring the choke is open at normal temperature, checking for fuel leaks and damaged fuel lines, inspecting accelerator pump operation, checking fuel quality, checking valve clearances and camshaft lift, and having a professional assess electronic controls. When diagnosing carburetor problems, running the engine without the air cleaner may be necessary but can lead to backfires. Overhauling the carburetor can be done with a rebuild kit and solvent or by obtaining a new or rebuilt carburetor. Follow the specific instructions provided with the overhaul kit, as carburetor designs vary.

To relieve the tank pressure, you need to remove the fuel tank cap.