The engine will not idle?

2003 MAZDA B4000
240,000 MILES • 4.0L • V6 • 2WD • AUTOMATIC
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OMANOGOD62$
  • MEMBER
  • 1 POST
After replacing battery, alternator, fuel filter, AEI valve on top of throttle body, EIC valve on the side of throttle body it still won’t stay running. Does crank but won’t stay running. Please advise.
May 2, 2025 at 12:51 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,604 POSTS
It sounds like you have a vacuum leak, but can I ask if you have a check engine light on? If so, we should run the codes, this guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is another guide to show you how to fix an engine that stalls at idle:

https://www.2carpros.com/articles/stall-at-idle

Please go over these guides and get back to us.
May 2, 2025 at 3:27 AM
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