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Strange noise when driving with low revs
I have a 98 fiesta 1.3. Whenever I pull away or change up a gear, the 1st couple seconds of acceleration are accompanied with a strange noise (possibly vibration) from underneath the car. If going up a hill in 3rd it will stay for the duration of the hill, as it does with any situation when you are in too high a gear. Doesn't happen when idleing
My guess was the exhaust but the middle and back sections have been replaced and checked by another garage and is apparantly fine.
Answers
No best answer has yet been selected by kramer81. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Its difficult to describe a noise in words. It sounds cross between a sink draining and metallic vibration. definitely not crisp eating :)
The noise is at its worst if you drive in too high a gear. Strangely it doesn't seem so bad in the morning. I don't know if thats because everything is cold or because there is a higher fuel mix.
It seems to come from directly underneath the cabin rather than the engine bay but I could be wrong.
PS It is worse with people in the back seats so you could be right, won't do any harm to try some Optimax.
Thanks for all your answers.
It should be noted that this noise has been present for over 3 years and 30000 miles without any obvious effect on performance. In fact, only the perishable things have ever needed replaced.
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