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International Automotive Technicians Network

Automotive Technical Discussion Forum

Professional automotive forum for all types of vehicle repair discussion that does not fit into one of our more specific technical forums. Discussions include both OBD and OBD2, engine performance analysis, diagnostic best practices, service information, vehicle standards such as J1962, J1939, J2534, OBD2 modes (e.g. MODE$06), ignition and fuel system analysis, alternative propulsion (e.g. hybrid, electric, natural gas), and more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Theory Forum.

Recent Automotive Discussions in the Automotive Technical Discussion Forum

Corrosion repairs on aluminium heads
09/27/2026 in the Technical Discussion Forum
G'day iATN members. New cylinder heads for most cars are all over the internet these days, but years ago that wasn't the case, no internet back then. Consequently, many of us had to repair bad corrosion and cracks by tig welding. I was never overly concer...
2015 Chevrolet Tahoe P0333
09/24/2026 in the Technical Discussion Forum
[Driveability: 15 Chevrolet Tahoe LTZ 5.3L] Hello all! I've got a situation we are stumped on here. We put a new 5.3L long block in this 2015 Tahoe. It came in with a hard misfire, lack of power, bad misfire etc. Compression was in the 80's on a couple c...
2019 Ram 1500 3.6 Misfire
09/23/2026 in the Technical Discussion Forum
[Driveability: 19 Ram 1500 Big Horn 3.6L] Hi, the history on this truck is left bank was running very rich because of bad oxygen sensor. After weeks of driving with new oxygen sensor it has an intermittent misfire number 2 which is on the same bank. I re...
weird
09/19/2026 in the Technical Discussion Forum
[PowerTrain: 13 Subaru Outback 2.5i 2.5L] So my son gave me this Outback w 117k on it and it had a slight timing chain noise One second on startup and only at idle when warm. After a run at speed it quieted down. Recently the noise has completely disappe...
Cummins 'choppy' off idle issue
09/09/2026 in the Technical Discussion Forum
[Driveability: 01 Dodge Ram 3500 5.9L] Guys: This Cummins had a Banks Power Pack system put on it many years ago, and has set for extended periods of time. The codes were drawn, no check engine light on, by Auto Zone for I don't have access to a DRB III...

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