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Your 1999 mondeo runs well on tick overand up to 35 mph but when you need extra power it holds back and makes a noise in the exhaust near the catalytic?
Wiki User
∙ 16y ago
While I am not familiar with your particular vehicle, the symptoms you describe suggest that the catalytic converter has been "poisoned" by an over rich fuel mixture, and is partially plugged up. If this is the case, there is no repair possible, and requires either that the catalyst be replaced, if possible, or that the entire converter be replaced.
Wiki User
∙ 16y ago
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