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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

Atkinson Cycle Volumetric Efficiency
11/12/2017 in the Technical Theory Forum
What is an expected volumetric efficiency percentage on Atkinson cycle engines? Where do you collect your data when you do a VE test drive on a hybrid vehicle? I am assuming the highest RPM possible during a heavy acceleration. TIA.
alternator choices
11/12/2017 in the Technical Theory Forum
good morning group . i'll be replacing a battery and alt. tomorrow and i was wondering about this : if a higher output alt. is available , is it better to use the higher output option , or is it better to just use the stock application ? advantages/disadv...
PID definitions?
11/10/2017 in the Technical Theory Forum
I have trouble finding definitions for many PID abreviations. I used a Snap-On Solus Ultra the other day on a 2007 Honda Odyssey and came upon several PIDs I didn't know what they were. As example "FSS" and "Fuel Inj (active side)" were a couple that I wa...
Alignment theory
11/09/2017 in the Technical Theory Forum
Has caster and it's effects ever been taught properly? It's always been compared to a shopping cart wheel, which only has one pivot point, which simply just makes the wheel drag behind that point, and it doesn't matter if the wheel is one inch or 3 inches...
3.6 P0008 Bank 1 timing correlation
11/04/2017 in the Technical Theory Forum
[Engine: 09 Buick Enclave CXL 3.6L] Looked at it for another shop quickly late yesterday afternoon, customer needed it back by 5:00, with above code. about 144K miles and runs and idles well and quiet, fuel trims look average. Shop did comment on oil lev...

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