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Automotive Technical Theory Forum

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.

Recent Automotive Discussions in the Automotive Technical Theory Forum

2004 f150 5.4 new body engine
10/17/2018 in the Technical Theory Forum
Asking for my employee why is this motor only one year what are the differenced between the newer motors.Wondering if we could swap some stuff with a newer used engine to get him going.These things are pricey.
Random stalling running bad
10/14/2018 in the Technical Theory Forum
[Driveability: 98 Toyota Tacoma 2.7L] I had a Tacoma in a couple weeks ago for a stalling issue going down road or at idle. Checked codes and found a P1300 and a P1310 for igniter circuit malfunctions (waste spark system). Scoped both IGF and IGT signal ...
OBDII Mode $01
10/11/2018 in the Technical Theory Forum
I´m preparing a document about OBDII for technicians and I need an updated version of SAE/ISO standard of the Mode $01 (parameters). I have a 2012 version of ISO 15031 and I do not need the complete document. Only the updted list of generic PIDs....
O-Ring Decay Experiment
10/10/2018 in the Technical Theory Forum
This project started partly in jest but continued mostly out of curiosity. So i thought would share my findings. Im sure we have all heard at some point in our careers that POL's (petroleum, oils, and lubricants) will cause orings to deteriorate over time...
how does a chrysler seat track position sensor work
10/09/2018 in the Technical Theory Forum
[Electrical: 10 Chrysler Town & Country LX 3.3L] shop key info says the restraint module sends a current thru this sensor to verify circuit integrity, but that's all the info it gives. this is a two wire sensor attached to the drivers seat upper track. I...

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