Mechanics

78 460. NOISE WHEN ACCELERATE

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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Kotzbach
April 3, 2012.




Have apro look at this we can't hear it to give a good diagnosis

Hmac300
Apr 3, 2012.
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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Tiny
Kotzbach
Apr 6, 2012.
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

Hmac300
Apr 6, 2012.

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