Rattle on exceleration 2.5 v6 - Alfa Romeo Forum
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alfa 156 2.5 v6

Help Rattle on exceleration 2.5 v6

Going up the gears say 4th to 5th and putting my foot down there is a rattling sound coming from the engine bay somewhere that goes away if i come off the power slightly, also the performance has definitely dropped since this rattle started. does anybody know what this might be i would be grateful for anybodys advise.
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Re: Rattle on exceleration 2.5 v6

light metalic sound is normally cracked exhaust heat shield. However, shouldnt effect performance though
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Re: Rattle on exceleration 2.5 v6

If it is only under heavy load then it could it be knocking/pinking? Are you using a quality petrol or supermarket gumph?

It could be that a knock sensor has gone which will prevent ignition retardation. A check on the Examiner program by a dealer or independent shoudl tell you.

A cheaper (?) check could be to run the petrol low then put some super unleaded in and try again.
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exceleration , rattle

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