Technical Exhaust Problems?

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Technical Exhaust Problems?

ring_ringuk

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May 22, 2005
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Hello people, recently I have bought Punto 1.2 Sporting 16v 2001 for my first car :D I love it. Unfortunately I think I have a problem. When the engine reaches between 3800 - 4000 rpm the engine makes a higher pitch noise more like a buzz :confused: however once over 4000 its fine. Can anyone help? I have had a look, but the exhaust system it looks fine. Am I right in thinking it may be the manifold? And if so should I be worried or still driving?
 
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