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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

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.
EGR Cleaning
07/01/2026 in the Technical Discussion Forum
[Miscellaneous: 18 Ram 2500 Big Horn 6.7L] Looking for some info on my Ram Cummins 6.7L. I keep getting a "perform service" message, no codes. Spoke to a service writer at a local dealership; he says Ram recommends EGR service at 67.5K miles. I have 70K ...
1998 Chevy Malibu dash repair
06/27/2026 in the Technical Discussion Forum
Can any of you recommend a good repair company to repair a dash console that you have used and trust? That can repair a gas gauge is not working in console. thank you Ed.
Honda window regulator
06/27/2026 in the Technical Discussion Forum
[Electrical: 06 Honda Pilot LX 3.5L] Customer replaced driver window regulator with aftermarket part. Typical failure, motor works, cables all wadded up. After replacing regulator, nothing works. Brought it to me to check. I verified all involved circuit...

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