When I pull hills check engine will blink on for split second every once in a while. Also once I unload the engine on the level it sounds lean. It has a lot of valve noise but goes away in about 1/4 to half mile of running on the level. Thinking it is a weak HPOP. It's been doing this for years but seems to slowly be getting worse. Not a lot of power either. 10 k mod and slightly bigger turbo with aero turbine exaust. Pro afe air cleaner but those are the only mods. Any ideas would be greatly appreciated.
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