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dunno but i just remembered another wierd thing with my car. i have a 60 series slowmaster muffler. and i have a faze air fuel gauge, and i have noticed when ever im driving 65+ mph, and let off the gas, the exhaust hums like im giving it gas but the rpms drop to around 1,500 and when i look at my A/F gauge it shows i have exactly no A/F ratio what so ever. there is no light, and the exhaust is humming, and the car slows down rather fast untill it reaches about 55 mph, then the crazy A/F ratio returns and it coasts like normal. and while this is happening, i can give it gas at anytime and my A/F ratio returns, but only if i give it gas during this interval. i am not if this is a back pressure issue or something, but i have heard words like; "exhaust brakes/breaks" and "burnt exhaust valves"
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AUTOBOT
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