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    Exhaust Leak cause high fuel trim?

    Thank guys. Yeah, I was hoping it must be a very large exhaust leak to cause this and be worth opening up this can of worms. I think I will put a shop vac exhaust on it and walk around with a soapy spray bottle. I have not been able to find it by looking at it or listening. Hopefully it's...
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    Exhaust Leak cause high fuel trim?

    Has anyone seen an exhaust leak on these trucks be significant enough so that the O2 sensors tell the ECU it needs +20% long term fuel trim? I have an exhaust leak that I can hear when inside the vehicle but I don't know if it is really impacting performance. I was half expecting to find the...
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