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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| Sealing Toyota EVAP System 05/22/2012 in the Technical Theory Forum [Driveability: 03 Toyota Corolla CE 1.8L] As i have learned about EVAP systems in general, it appears that at the least all have something like a purge valve (which vents HCs into intake manifold, and introduces negative pressure into EVAP system) and a ... | ||
| Fuel Trim --a wiki attempt 05/17/2012 in the Technical Theory Forum The other day, in someone's response to a post, they indicated that the whole fuel trim thing didn't make alot of sense to him. In my opinion, fuel trim information is the greatest thing since sliced bread. I'm hoping this post will kind of act like a wik... | ||
| Relay 5 pin pin out 05/17/2012 in the Technical Theory Forum Looking for the pin out of a chevy 5 pin relay. #7866. I understand what pin numbers do what, I am looking for what steel pins are what numbers Assuming I am looking at the face, if I have two on the top row(each corner) and three on the bottom row(each c... | ||
| Scope ground connection 05/15/2012 in the Technical Theory Forum If a person were to scope the signal of 3 wire hall effect sensor, do you think it is better to connect the ground lead of the scope to the battery negative or to use the hall effect sensors ground which goes back to the ECM/PCM? Please include the theory... | ||
| Tech A vs. Tech B 05/09/2012 in the Technical Theory Forum Tech A says a clogged fuel filter will cause a cold no start condition, even intermittently. Tech B says a clogged fuel filter will most likely cause a driveability complaint, such as stalling during prolong use, especially under load, or lack of power un... |
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