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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

Inner C/V vibration
05/27/2020 in the Technical Theory Forum
[PowerTrain: 11 Hyundai Santa Fe GL 2.4L] We have this one in here and had both front drive axles needing replacement due to BOTH INNER boots ripped open and joint grease long gone. We failed to test drive it before jumping into replacement. The thing no...
Transponder or reciever?
05/20/2020 in the Technical Theory Forum
[Electrical: 11 Chevrolet Cruze LT 1.4L] Was told from another shop that battery went low during detailing and ever since car has not started/cranked, security lamp lit with service theft system message. One key listed in data pid and it turns ignition a...
Ignition amprage waveform
05/18/2020 in the Technical Theory Forum
[Driveability: 02 Saturn L300 3.0L] [2002 Saturn L300, Ignition Waveform] Hello I'm trying to interpret this wave form. I'm trying to understand why there is a spike at the top of the waveform. Do you guys think its the coil itself or is there something...
P0411 over pressure?
05/06/2020 in the Technical Theory Forum
[Driveability: 09 Cadillac DTS 4.6L] Trying to get a handle on this as it fails first phase of test which tests for if system can produce enough pressure. I command it on and AIR pressure starts at 99kpa and climbs to 116/117kpa. Baro reports 100kpa. The...
OTC Vission 11
05/04/2020 in the Technical Theory Forum
Hi All, have posted this question in the tool and equipment section but did not get any response. I need advice please on hooking an OTC vision 11 lab scope to a monitor screen . Unlike the Snap On Modis the OTC does not connect to the screen when pl...

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