I have just installed a Holley 350 carbie (61 main jets, 8.5 power valve) to my 1989 3F petrol Toyota Landcruiser to try and improve economy more than power. I have a few issues, when the engine has reached operating temperature there is a whistle from the carbie which I believe is coming from the butterfly's as soon as some load is applied to the engine it goes away. When it is cold there is no noise at all. Any ideas on how to fix this?? The economy is still no better than the old carbie, any suggestions on what I can do to improve this, i.e. jet sizes, power valve size etc etc.
Alan
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