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78 Lincoln Mark V 460. Noise when accelerate

Tiny
KOTZBACH
  • MEMBER
  • 1978 LINCOLN MARK V
  • 157,000 MILES
Hello,
I hear a deaf noise as a humming when I accelerate. All depend the range fo speed or rpm. When cruising, the noise can be heard between 35 to 60 mph. When starting, I can hear the noise if the car need force ( for exemple in a slope or a hill ). Ohterwise, the faster I go, the car make no more noise. Thanks for all. (And excuse me I write as I can I'm from France)
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Tuesday, April 3rd, 2012 AT 12:45 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have apro look at this we can't hear it to give a good diagnosis
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Tuesday, April 3rd, 2012 AT 2:42 PM
Tiny
KOTZBACH
  • MEMBER
  • 2 POSTS
I can try to be more clear.
There is no noise when iddle. On D position appears the noise during acceleration, certainly a relationship with torque. The noise/vibration seems to come from the right of the car at the level of the front passager. Thanks if you have some clues.
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Friday, April 6th, 2012 AT 11:42 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It may be a broken shield from the cat converter if it's more like a rattle. It cold also be the humming that you hear. Other than that I really couldn't say
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Friday, April 6th, 2012 AT 11:44 PM

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