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Engine will only rev to 4000 RPM's

Tiny
GORDON YATES
  • MEMBER
  • 2004 FORD MUSTANG
  • 3.8L
  • 6 CYL
  • 2WD
  • MANUAL
  • 130,000 MILES
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.
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Sunday, November 20th, 2016 AT 8:22 AM

1 Reply

Tiny
SQM
  • 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.
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Sunday, September 12th, 2021 AT 1:45 PM

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