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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

Yaw & Decel calibration
05/05/2022 in the Technical Theory Forum
What did I miss???? Why would the Yaw and Decel sensors for stability control need to be recalibrated with a routine replacement of brake pads and rotors?
Help with DIS ignition waveform
05/05/2022 in the Technical Theory Forum
[Driveability: 03 Ford Taurus SEL 3.0L] This car came in running well, but customer said it "cuts out" after driving about 20 minutes at highway speed. I was able verify the concern. Feels just like a bad plug or wire. This is DIS, so if one cylinder mis...
Intermittent CKP Loss of Signal
04/30/2022 in the Technical Theory Forum
[Driveability: 10 Ford Explorer XLT 4.0L] I've probably worked on thousands of these trucks and never come across a problem like this, hopefully someone here has. What makes it better is that it's the wife's truck. Here's the long version... I inherited ...
Fuel Trim Rich
04/13/2022 in the Technical Theory Forum
Mostly fishing for thoughts, as I\'m not sure I have a truck worth fixing yet. But I do have a truck in my shop with history P0172 and P0175 codes. It\'s a 09 Silverado. The SEL had since gone off from when he made his appointment. Fuel trims are bot...
LUG NUTS
04/12/2022 in the Technical Theory Forum
I have a 1978 Corvette that has problems with the lug nuts coming loose. One of the front wheels actually came off on customer while driving. Have serviced this car for years. Torque spec I have found all over is 80 ft lbs. Tighten lug nuts, drive it 20 m...

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