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International Automotive Technicians Network

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

Injection issue that didn't make sense
01/21/2023 in the Technical Theory Forum
[Driveability: 18 Nissan NV2500 S 5.6L] Vehicle repaired so not a tech help but more of a "what can I do to prevent this from happening again" question. Had a NV van come in with an P0205 cylinder 5 injector DTC and a strong consistent miss. Tech replace...
Internal resistance of any EMF source
12/08/2022 in the Technical Theory Forum
Hello IATN members. [Equivalent electrical circuit of the link provided on series voltage opposing] There seems to be confusion over this rudimentary basic electrical law. Compare my hand drawing to the link. There is absolutely no electrical difference b...
another unusual scope pattern. How is this possible?
11/20/2022 in the Technical Theory Forum
[Driveability: 10 Chevrolet Equinox LS 2.4L] I am thinking the factory wire diagram is wrong. I attempted to post the diagram but wasn't able to get the IATN site to accept it. I have attached scope saves from "inj even" and "inj odd" fuses. The inj even...

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