Surging is the result of a "lean" fuel mixture, meaning too much air and not enough fuel. The problem is most likely a dirty carburetor or an air leak in the intake system. To fix, inspect the carburetor and intake manifold for cracks or looseness. Tighten all fasteners to ensure all seams are airtight. Clean out the carburetor with some carb spray and blow out all holes/orifices with compressed air. If problem persists, carburetor must be removed and disassembled/rebuilt.
it could be caused by a few different things. the pneumatic governor or a fuel issue. an easy test is to hold the throttle on the carb closed to an idle. if it continues to surge then it is a carb issue, if it stops it is a governor issue
You probably have a dirty carburetor causing that surge.
The most common cause of surging is a dirty air filter. EPA approved carbs tend to run lean causing the surge condition described. Main jet needs to be replaced with next size larger.
The engine is receiving more gas than it can consume. Sometimes the carburetor needle valve will vibrate to the open position or the float valve will stick open. Also, a fouled spark plug will not provide sufficient spark to ignite the fuel. Check out a lawn mowers and small engines repair manual from your public library for troubleshooting and repair procedures.
You need to either adjust your carburetor richer or leaner while at full throttle.
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Check your vacuum lines this usually the cause for a surge in engine speed when idling or running.
The price of pineapples in Hawaii is less likely to cause an engine to hunt or surge.
Engine surge in a 2004 Kia Sedona is often caused by a clogged fuel filter or dirty injectors. When insufficient fuel reaches the engine, it will exhibit these symptoms.
my sparkplugs are gaped to wide can that cause my car to surge and poor starting
the engine to stall and surge at idle
the surge the engine does when you first start it up is normal, the engine is built to do that to assist with warming up the system it should lower after 30secs or so.