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Starts then dies right away: idle air and vacuum basics

Many start-then-die problems come from dirty idle air parts or vacuum leaks.

When to use this guide: It starts but dies unless you hold the gas.

Overview

When the engine fires and immediately dies, it's almost always an airflow issue. A clogged idle air control valve, a dirty throttle body, or a small vacuum leak can each prevent the engine from idling on its own. These are cheap and quick to address, do them first before touching anything else.

What you need

Quick checks first

  1. Quick check 1
  2. Quick check 2
  3. Quick check 3

Step-by-step

  1. Step 1
  2. Step 2
  3. Step 3

If that did not fix it

Source links

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