What causes an engine to diesel after ignition is off?
What causes an engine to diesel after ignition is off? An engine dieseling or running on after ignition is off is due to engine idle speed set to high. What are the signs of a failing ignition switch? Common Signs of a Failing Ignition Switch Engine Will Not Start. The problem here is probably: An anti-theft fault; Fault in the fuel pump circuit; Ignition circuit; Engine computer; If the anti-theft light is flashing, the computer is NOT recognizing the key or key fob and is; preventing the engine from starting. Can a bad ignition switch cause an engine to die?...