Ok so I've had this h23 in my car a while. Its been acting up just now after replacing exhaust valve guide seals. I have no idea what could be the issue but the car is slow as *uck and the intake is ridiculously loud. I've checked everything and nothing appears loose. It also has a semi loud rattling throughout the rpms and it gets extra loud around 2k rpm. It pisses me off because it finally doesn't smoke but now it runs like piss.
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H23a1, slow and loud.
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