Rough Running When Cold - Alfa Romeo Forum
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Rough Running When Cold

Hi All
My 155 is running rough when cold the revs are erractic and the car splutters ( this all seems to happen below say 2500 rpm over that when cold it runs ok ) .... then after a mile or two it runs fine.
Also doesnt do it all the time but it is getting more common.
Any idea's or where should i look
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Re: Rough Running When Cold

I have a similiar fault on my 156, just came back from garage never done it before now. wont rev properly until its run for 30 secs then its fine?
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Re: Rough Running When Cold

keep an eye on your coolant levels
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Re: Rough Running When Cold

Check the inlet for leaks anywhere from the air filter onwards...

Idle control valve could do with a clean...

Lambda sensor could be shot..

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