Professional automotive forum for discussion of the theory of operation for any automotive system or component. Discussions include electrical and electronic theory, engine propulsion theory, fuel system theory, ignition systems theory, and much more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Tips Forum.

• HD/Fleet Forum
• HVAC Forum (Heating, Ventilation, and Air Conditioning)
• Technical Discussion Forum
• Technical Theory Forum
• Technical Tips Forum
• Tool & Equipment Forum
• Transmission Forum

• Classifieds Forum
• Educators' Forum
• Emissions Forum
• Industry Events Forum
• Industry Issues Forum
• R.P.M. Forum (Restoration, Performance and Motorsports)
• PC Users Forum
• Shop Management Forum

• Castrol Forum
• Snap-on Handheld Users Group