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Engine chirps in startup and when accelerating

Tiny
JTC81
  • MEMBER
  • 2000 FORD F-150
  • 5.4L
  • V8
  • 2WD
  • 400,000 MILES
It does not make a chirping noise when idling. Mainly it does it when accelerating but stops as soon as I let off the gas.
Sunday, March 6th, 2022 AT 6:44 PM

2 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

One of the common causes of chirping noise is a worn serpentine belt.
So, inspecting the belt is a good place to start.
Look for wear and cracks on the belt. You can also spray belt dressing on the belt while the engine is idling and see if that changes the noise. If it does, then the issue is likely the belt.

Here is a helpful guide:

https://www.2carpros.com/articles/chirping-noise

Please let me know what you find and if you have any questions.

I have attached the belt diagrams below.

Thank you.
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Monday, March 7th, 2022 AT 9:51 AM
Tiny
JTC81
  • MEMBER
  • 2 POSTS
Removed the belt and started the engine with no chirp. It only does it when you're on the gas and then goes away as soon as you let off.
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Monday, March 7th, 2022 AT 10:02 AM

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