After replacing the ECM, the car will not start?

2002 BUICK RENDEZVOUS
164,000 MILES • 3.4L • 4WD • AUTOMATIC
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BRENDA-LYNN
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  • 2 POSTS
Replaced ECM. All the lights on dash are now out but car won't start.
Jan 29, 2023 at 6:52 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,256 POSTS
When you say the car won't start do you mean the engine won't crank over (starter) or the engine turns over but does not run? Please check out this guide to help us get started on fixing the problem:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please go over this guide and report back.



Jan 30, 2023 at 2:21 AM
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BRENDA-LYNN
  • MEMBER
  • 2 POSTS
It won't turn over.
Jan 30, 2023 at 2:24 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,256 POSTS
Thank you, can I ask if the security light is flashing when you try to crank it over? Also was the ECM programmed before you installed it or how exactly did you replace the ECM?

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please go over this guide and report back.
Jan 30, 2023 at 9:33 AM
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