Comments by "flagmichael" (@flagmichael) on "Toyota Fuel Trims and live data diagnosis tips!" video.

  1. It's worth mentioning that lacquer thinner varies widely; some (like Klean Strip Lacquer Thinner) have significant amounts of methanol, which erodes aluminum. http://www.kleanstrip.com/uploads/documents/GML170_SDS-1605.48.pdf Our favorite Car Care Nut has mentioned the issue of P0420 codes is in the lineup for this series on DTCs. I know plenty are looking forward to it. I have a recommendation for a preliminary check - might help, can't hurt. Check for exhaust leaks, particularly ahead of the converter. My favorite way to look for leaks is to connect a shop vac to blow low pressure air into the exhaust with the engine off, giving it a moment to clear any debris out of the hose. Since we have a Toyota Master Mechanic watching out for us, it would be a good idea to get his blessing before blowing air into the exhaust.
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  2. This clears up a lot for me!
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