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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.

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Recent Automotive Discussions in the Automotive Technical Theory Forum

Thoery On How Nissan 2014 Intake Runner System Works
07/18/2017 in the Technical Theory Forum
Would like info on intake runner system as too with the runners closed what voltage should the ecm see from the sensor and would it command it on koeo or with a snap throttle with the engine running ?
Crankcase integrity testing with a vacuum gauge
07/13/2017 in the Technical Theory Forum
Hello everybody, I have recently viewed a training dvd discussing vacuum waveforms. The material starts with testing performed using an anlogue vacuum gauge. Then it evolves into using a vacuum transducer with a dso. I am trying to implement one specific ...
Climate control functions
07/08/2017 in the Technical Theory Forum
I got to thinking about how I use my climate control. Most of the time it is set to a temp and ignored. There are times that I roll down the windows to enjoy the outside air. If there is much temp differential the climate control reacts so I simply shut i...
Ignition RPM Sensor
07/06/2017 in the Technical Theory Forum
Hello fellow iATNers Looking for some input from people who really know the ignition system on a 1974 Mercedes-Benz 450sl. I have already diagnosed the problem, but looking to figure out exactly how this works and whether or not what I have is Merced...
Looking For Known Good Waveform Of Vehcile Speed Sensor At T-case
07/03/2017 in the Technical Theory Forum
Help is appreciated looking for a known good waveform of a vss at the t-case.

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