Take the head off and replace BOTH valves.
Sounds like the fuel inlet valve is stuck shut, or the float isn't working properly.
If the egr valve was stuck open, the engine wouldn't idle. If the egr valve was stuck closed you may hear excessive pinging (spark knock) and in most vehicles, the check engine light would illuminate.
If the engine were to backfire for whatever reason and the pcv valve is stuck open, the backfire could carry into the crank case and ignite the crank case fumes. I have seen valve covers blown off an engine from this situation.
It should be towards the passenger side of the engine stuck in the valve cover.
Several things could make a carburetor backfire. The engine could be out of time. the carburetor could have a stuck float, or the engine could have a stuck valve.
It is on the left side of engine, but stuck in the intake manifold. That is you standing in the front of engine.
Yes, a stuck IMRC (Intake Manifold Runner Control) valve can cause an engine misfire. The IMRC valve regulates airflow to the intake manifold, and if it remains stuck in one position, it can lead to an improper air-fuel mixture. This imbalance can result in poor engine performance, rough idling, and misfires, particularly under certain RPM ranges or loads. Addressing the issue usually involves inspecting and potentially replacing the malfunctioning valve.
a stuck valve or bad plug or plug wire, or bad cap and rotor to include a cracked or missing vacum hose will make any engine miss.
To adjust the valves on a 17.5 Tecumseh engine, first, ensure the engine is cold and remove the spark plug. Then, locate the valve cover and remove it to access the valves. Using a feeler gauge, set the intake and exhaust valve clearances to the manufacturer's specifications, typically around 0.005 to 0.007 inches for intake and 0.007 to 0.009 inches for exhaust. Finally, reassemble the valve cover and spark plug before starting the engine to check for proper operation.
Valve, valve spring, piston, piston ring, cylinder wall, head, headgasket, diluted oil, stuck injector,
A faulty or clogged egr valve can cause an engine to run rough. If stuck or clogged the valve can be cleaned after removal with carburetor cleaner.
the engine carbon cleaning service to remove these buildup.