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19/05/2023 12:27 pm
Topic starter
I have a 2008 Mazda 3 with 165,000 miles. I cleaned my mass air flow sensor and throttle body after watching Scotty’s video and now my car is lurching/jerking in 4th gear when I’m decelerating. It does it when it’s in 4th gear, not when it’s changing gears. Can this be caused by a bad upstream O2 sensor? The check engine light is NOT on.
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19/05/2023 2:28 pm
What does live data look like, particularly the O2 sensor output?
