rhwindley1954 Posted January 13, 2017 Share Posted January 13, 2017 My 2001 IS300 has a lack of power. At times it takes off normal. Other times it takes off very slow as if it has no power. I have changed the timing belt and spark plugs yet the problem still exist. No check engine light. Not sure what to do next. Can anyone help? Thank you. Quote Link to comment Share on other sites More sharing options...
TrevC Posted January 19, 2017 Share Posted January 19, 2017 You could look at the exhaust being blocked...see how much gas comes out when revved and if it sort of whistles then there could be a blockage Quote Link to comment Share on other sites More sharing options...
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