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Mb6 won't keep power.


Dodd89
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I'm not sure where this belongs as it could be a blocked exhaust, electrical problem, or mechanical. But as I reach 4.5k rpm engine gets deeper and feels like it hits a wall, same in every gear and the Revs take forever to rev up after that rpm. Before then everything is fine and pulls well.

*vtec engages but when it does there's some sort of tss-tss-tss-tss sound and I'm not sure if it's exhaust.

*oil is ok

*did have a cone filter on there but taken off and put standard box on to see if it was that.

*there's also a rattle in the exhaust in the pipe between cat and middlebox.

Hope someone can help me diagnose this as this will be the final straw for this car, I've tried to love it but it won't let me lol.

Some people say timing, but seems to pull OK until 4.5k rpm. Thanks in advance, hope you can help me out.

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