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lumpy when cold!!

piper

New Member
Joined
Jul 8, 2013
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2
Car
mercedes ambiente v280
Hi I have a v280 2001 recently had new chains guides tensioners etc compression is 210 new oxygen sensor,brake pedal sensor temp sensor lots of work! However when starting from cold it us lumpy and actually feels juddery for about 20 mins then calms and runs very sweet again...after so much work I expected a few knockon effects but running out of ideas......anyone have any please?? Or us this normal for a vehicle this age?? Cheers!!
 
It sounds like it's running lean so; air leak, temperature sensor or MAS would be my thoughts.
 
Hi thanks for your ideas it has had a new temp sensor and airflow meter also....
 

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