Hello Scotty and greetings from your fans in Bulgaria! Thanks to your videos I got myself a 2011 Toyota Venza V6 imported from Canada with a 100k miles on it. I have a positive long term fuel trim and I cannot find the reason why. Bank 1 is at 12% and Bank 2 is at 7%. There are no codes. I tried injection cleaning with 3 different brands of fuel cleaners and that did not help. No vacuum leaks, checked with my DIY smoke machine. Cleaned MAF sensor, changed filter. Changed both upstream oxygen sensors with new Densos, and LT trims did not change. And after doing all these things I got the car converted to LPG. Same trims as on petrol, so we can rule out the fuel injection system... Could it be the donwnstream oxygen sensors? Do they affect air-fuel ratio? Appreciate your help!
It certainly can be oxygen sensors if they give the wrong information it won't run right if it has catalytic converters they can easily be worn to and cause that
Thank you Scotty! I will replace downstream oxygen sensors and report back. Merry Christmas and Happy holidays!
what the heck is fuel trim?
