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I have a 08 XT with a vacuum leak. The STFT goes to 25% and then it throw code P0171 (lean fuel). At highway speeds everything works normally. So I'm thinking vacuum leak. I tried using a smoke generator to find the leak but couldn't. 1. Does anyone have a vacuum diagram for an 08 XT? Any thoughts of specific things I should look at? No other codes. Oxygen sensor was replaced. MAF was replaced.
 
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