Misfire Diagnosis with Sue from 1A Auto!

In this video Sue, from 1A Auto, and I show you how to diagnose and repair a misfire condition on a Toyota 4Runner. Sue is an excellent technician and in this video she teaches me some new things about misfires and how to address them. The best part, you get to learn new stuff too!

A big thanks goes to 1A Auto and Sue for having me out at their production studio to film. You guys are awesome!

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12 thoughts on “Misfire Diagnosis with Sue from 1A Auto!

  1. I disagree with not using anti-seize on the threads. I have had to forcefully remove dry spark plugs and then tap the threads before putting new plugs in. Modern plugs can last 100,000 miles before they fail.

  2. Can you do a video on diagnosing running rich?
    My imp has a constant -10% LTFT value with STFT being around 0%.
    No check engine lights.

    MAF sensor values according to the g/s from OBD reading looks fine according to the service manual
    I did replace the secondary O2 sensor
    Primary O2 sensor values look good.
    No long cranking or smoke, so I doubt its a leaking injector.

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