Engine will only rev to 4000 rpm's

2004 FORD MUSTANG
130,000 MILES • 3.8L • 6 CYL • 2WD • MANUAL
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GORDON YATES
  • MEMBER
  • 1 POST
My car can only rev to 4000 rpm's when stationary in neutral. Up to 4000 rpm's it works without any problem. I am not sure if this is normal for this engine and has an engine rev protector or if something is wrong. Any information would help.
Nov 20, 2016 at 12:22 AM
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SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
Hello,

This vehicle has set rev limiter at 4,000 RPMs in neutral. So yes it is normal.
It is there to protect the components.
The reason you cannot rev past 4,000 RPMs in neutral is because it is programmed to do so in order to protect the drivetrain.
Especially from hard launches from redline. Which puts enormous amount of stress on the components and can brake or have premature wear.


https://www.youtube.com/c/2carpros/featured

Please let me know of any questions.
Thank you.
Sep 12, 2021 at 6:45 AM
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