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I drive a Mazda 3 2.0 sport 2007 model, LF engine done over 300k kms and my car doesn't have that take off power it used to and it is my pride and joy. I need to know what do service on it to improve its power. It is not modified in any way and I try always service it the basic way plugs, oil, filters. I haven't changed the petrol filter though (could it be the problem).
What advice can you give to a brother who loves his one and only car to improve its power on the road. What are the most important parts to service related to improving the car power and speed
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Whatsapp +267-75703737
I am in Botswana Africa

Please help
 

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Check the intake valves for carbon build up. Fairly common issue, easily solved by removing the intake and blasting it with walnut shell. If you aren't sure what this involves, just google direct injection carbon build up for complete details.....
 
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