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A vehicle fails an emission test due to a series of codes, with misfire activity found on cylinders 2, 4, 6, 8 and 3 – and a strange metallic sound can be heard when the rpms are raised. See how Carlton Banks solves this latest Pulling Codes case.
A Story of Codes P0302, 04, 06, 08 & 03
This month’s diagnostic journey begins with a 2008 Land Rover Discovery that is taken in to a local testing facility for an emission test and fails due to a series of misfire codes.
Misfire activity is found on cylinders 2, 4, 6, 8 and 3; at first glance this series of codes implies that there may be bank 2 issues, but the cylinder 3 code throws a wrench into that mode of thought.
Using an OBD II scan tool/dynamometer simulation/calculation program that can graph volumetric efficiency (VE) over rpms, contributor Glen Beanard devised a test sequence using real-world vehicles. This article takes you step by step through his diagnostic process.
Even for an experienced diagnostic technician, attempting to diagnose an intermittent misfire condition that occurs only under specific driving conditions can be a frustrating exercise. Contributor Gary Goms breaks it down, and includes tips for using a scan tool and a lab scope.
Nothing can turn a new tech into a veteran but time and experience, and often that experience is going to come from making mistakes – sometimes real bad ones – and learning from them (you hope). By addressing these most common mistakes right away with new tire techs, the worst of them can be avoided.
Now that rivet bonding is in the mainstream with the Ford F-150, it’s time for shops to look into training and equipment for this repair process.
To help reduce the headaches involved in servicing TPMS, it’s important to use the “Test Before Touch” procedures in your shop. Used properly, TBT can form a strong foundation for everything else you do regarding TPMS, reduce complexity and help you educate and keep your customers.
It can sometimes be difficult to make the correct diagnosis for a hard-to-start complaint. And diagnostic time may be extensive — and expensive. This article shows how certain tools have the ability to automatically analyze waveforms for you.
If you’re doing social media, are you doing it effectively? Are your accounts set up correctly? Are you posting often enough? Mark Claypool answers some questions.
Kenny Younkins, owner Related Articles – Streamlight Launches Updated Rechargeable Spotlight – Ingersoll Rand Expands IQV20 Battery Series – DEWALT Announces New TOUGHSERIES Lighted Tape Measures Ken’s Auto Service Center Akron, OH While Ken first said his favorite tool is his fishing rod, he said in the shop he prefers these five: Snap-on 3/8”
