What causes an engine to run but surges?
What causes an engine to run but surges? Engine will run, but it surges, hunts for a constant RPM 1. Partial Blockage of Main Jet. This is for bowl type carburetors only. Stop the fuel flow to the carburetor, either turn off the fuel valve or pinch off the line with a pair of fuel line pinch off pliers or a pair of vice grips. When to set DTC for engine surge maintenance? • After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times...