Dull thumping noise on hard acceleration

1177 Views 4 Replies 3 Participants Last post by Fergoo, Dec 10, 2018

Fergoo

Discussion Starter · Dec 9, 2018

Hi all, I have recently bought a 99 forester gt with about 200k on the clock! It runs nicely but on hard acceleration, especially up hill it seems to have a slight thump that happens maybe every second and gets faster as the car gets faster then goes away at higher rpm. I would love some help pleaseeeee 🙂🙂
Thanyou

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Kevin

· #2 · Dec 9, 2018

G'day & welcome aboard!

It would help if you could identify from where the sound is coming e.g. front, rear, center, left right etc?

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Fergoo

Discussion Starter · #3 · Dec 9, 2018

Thanks for your interest Kevin! It’s hard to tell I actually haven’t been able to pinpoint where it’s coming from? It seems to happen if I am in let’s say second and going slow then put my foot flat and when it gets to maybe 3k rpm it starts to mske this sound?

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leland grant

· #4 · Dec 9, 2018

you need to put this up on a floor lift and run it while off the ground, to me it sounds as if it could be a differential bearing, but a main drive shaft u joint or carrier bearing is also possible, . lift and find it first then see, ........ stop flooring the engine for now, until you repair it

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Fergoo

Discussion Starter · #5 · Dec 10, 2018

Yeah it’s hard to explain but to me it almost sounds like a fuel thing not so much something loose or worn out? It’s like the car is jolting back and forth?? Cheers

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