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

	Lexus camshaft housing damage 07/16/2026 in the Technical Discussion Forum [Engine: 03 Lexus LS430 4.3L] A couple of years ago I was asked to look at this LS430 because another shop had attempted to repair it previously and failed. Someone replaced the cam seals in this engine and scarred up the driver's side front camshaft hou...
	Dead short, now its gone 07/14/2026 in the Technical Discussion Forum [Electrical: 17 Chevrolet Silverado 1500 LT 5.3L] This truck has 40,400 miles on it and in great shape. The customer complaint was when hooked to a trailer, it would blow a fuse for one side of the 7 rv plug. This problem does not affect the truck lights...
	Interesting Flex Fuel Issue 2013 F-150 / MAF Discussion 07/11/2026 in the Technical Discussion Forum So the title kind of gives away the punchline I guess, but anyhow, I had this '13 F-150 with a 5.0L recently that the customer complained of a dieseling noise. And at times, under load, the engine sounded like a older diesel engine. Had rich codes for bot...
	GDI torque equalization startegy 07/09/2026 in the Technical Discussion Forum I am curious if I am the only one looking at ignition coil dwell time between cylinders on GDI troubleshooting.
	Scope - piston chart 07/08/2026 in the Technical Discussion Forum Can't seem to find the download. It's a block chart you place on the PICO screen, you enter the firing order. Then you can line up what each cylinder is doing. I'll post a pic when I find one.

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