Why Does My Car Keep Shutting Off

When your car shuts off repeatedly — at idle, while driving, or both — there's a pattern that points to the cause.

A car that keeps shutting off is experiencing repeated stalling, and the conditions under which it happens are the biggest clue. If it dies at idle, suspect the idle air control system, a vacuum leak, or a dirty throttle body. If it shuts off while driving, the fuel pump, crankshaft position sensor, or ignition switch are more likely. If it dies and won't restart for several minutes, a heat-sensitive sensor or failing fuel pump relay is often to blame.

Intermittent electrical problems are the trickiest — a corroded connector, a loose ground wire, or a failing ignition switch can cut power to the entire engine management system without warning. These can be hard to reproduce in a shop but may show up as stored codes in the computer. A thorough diagnosis involves checking for codes, monitoring live sensor data while driving, and inspecting wiring and connectors for corrosion.

Repeatedly stalling is unsafe and frustrating. Ez Mobile Mechanic will come to your Jacksonville location and spend the time needed to track down the root cause. We're a mobile mechanic in Jacksonville — no tow truck needed, no wasting your day at a shop. We bring the diagnostic equipment to you. Call (904) 788-7272.