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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

2008 chevy 5.3 vin3 oil pressure
04/27/2026 in the Technical Discussion Forum
just interested on how this oil pressure system functions. This truck has 320k miles on it but has been rattling with oil pressure issues for over 100k miles. Just came in with oil pressure gauge reading zero. Scan tool says 129 psi. I verifies sensor gro...
12 6.7 Cummins gaining oil
04/26/2026 in the Technical Discussion Forum
I bought this truck last year with 45k on it. Very clean one owner. It had just been serviced so when I went to change the oil at around 50k I slid a short 5 gallon bucket under it because it fit right in under the front dif. These hold about 3.5 gallons....
Chinese ICE hits 48% efficiency
04/21/2026 in the Technical Discussion Forum
Interesting read. Old timers might remember Smokey Yunick's version to capture waste heat with the Pontiac Fiero 4 cylinder motor, 1980's. " ost-efficient-engines-ever" "- yunicks-hot-vapor-engine-[...].html".
2001 Mazda B3000 SE 4x4 (Ford Ranger)
04/20/2026 in the Technical Discussion Forum
So this vehicle has low speed ABS activation between 28 and 35 MPH. If coming to a stop, it will have low speed activation and increased stopping distance. Upon *hard* braking, it ABS activation occurs and it pulls to the right. Prior to these symptoms oc...
Simple Start Issue Im not understanding
04/18/2026 in the Technical Discussion Forum
[Electrical: 11 Jeep Grand Cherokee Laredo 3.6L] Vehicle Towed in with major engine Issue, When it arrived the starter Cranked over no problem. The engine needed to be replaced so we installed a Used Engine. After the Install We have a NO CRANK with NO C...

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