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

	Wheel lug nut re-torque 03/11/2026 in the Technical Discussion Forum I have noticed some shops have a policy where they ask the customer to come in so a Tech can 're-torque' the wheel lug nuts after certain service procedures are performed on their vehicle. My question is, what does your shop do and why/ why not?
	FORD IDS, Account activation Tech Support No answer 03/10/2026 in the Technical Discussion Forum I have seen multiple post about Ford and IDS. We had a working account. Let it lapse, renewed it today for both IDS and FDRS. We started a new account because of business change. We paid for a year superscription , no problems got responded email. I can g...
	Hyundai hybrid compression testing 03/09/2026 in the Technical Discussion Forum Need to do a compression test on a 2020 Ioniq hybrid with push button start. When pressing the start button the car goes into EV mode. I didn't see a compression test under special functions on my scan tool. Anyone know how it's done?
	2016 GMC Sierra 1500 Injectors 03/05/2026 in the Technical Discussion Forum I'm just wondering if anyone else has run into the situation that I am about to describe: We had a 2016 GMC Sierra 1500 5.3L in for the VLMS gasket leaking oil all down the front of the engine. In order to remove the manifold the injector rails have to be...
	20 KW Propane Generator crank no start 03/01/2026 in the Technical Discussion Forum I have a 20 KW Elliott Magnetek Power Systems generator that runs on propane. It has a 4.3 liter GM engine. It is a late 1990's model, I think it is a 1998, and has only about 10 hours on the clock. It has never been hooked up to generate any electricity....

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