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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

Nissan Cvt Transmission
05/23/2019 in the Technical Theory Forum
I just had a 2011 Sentra in and performed tab NTB16-017. I was just wondering if someone could explain to me what the CVT-A and CVT-B counts relate to. I did not seen explanation in either the tab or service info. Thanks in advance for the educatio...
05/21/2019 in the Technical Theory Forum
Have a Fluke dvom, cheaper model bought it a couple of years ago or less old. When ready ohms particularity checking continuity of circuits it will initially read 1.5 ohms or so and slowly drop to .5 or .6 ohms, normal? Would the more expensive fluke or s...
Fuel pump startegy
05/17/2019 in the Technical Theory Forum
[Driveability: 07 Mazda CX-7 Grand Touring 2.3L] Have a question for all you Mazda guys: this should be a no brainer, but it's turning into more of a brain-teaser. Vehicle will crank, start, and stall. Ether makes it run. There isn't any fuel pressure. P...
Replacing aluminum bolts with steel
05/14/2019 in the Technical Theory Forum
[PowerTrain: 11 Audi Q5 Premium Plus 2.0L] Can anyone think of a reason why it would be a bad idea to replace aluminum bellhousing bolts on this vehicle, a 2011 audi q5 2.0t? Personal vehicle I just bought with a bad motor. I'm not a fan of aluminum bolt...
Head Bolt Torque - New Bolts vs. Old Bolts
05/07/2019 in the Technical Theory Forum
[Engine: 06 Honda Accord EX 3.0L] This vehicle uses the 12-pt head bolts. Per the repair information, the following instructions are provided: "11) Measure the diameter of each cylinder head bolt at point A and point B. 12) If either diameter is less tha...

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