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

	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...
	Current Toyota Reflashing Techstream ? GTS ? 04/16/2026 in the Technical Discussion Forum Im hopeful someone can just guide me hear as Opus Support was not much help Cardaq M Im understanding that Techstream is NO LONGER being used and GTS Is the software to use now ?? For reflashing ?? So Download GTS and will it walk me through REFLASHING ??...

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