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Automotive Technical Discussion Forum

Professional automotive forum for all types of vehicle repair discussion that does not fit into one of our more specific technical forums. Discussions include both OBD and OBD2, engine performance analysis, diagnostic best practices, service information, vehicle standards such as J1962, J1939, J2534, OBD2 modes (e.g. MODE$06), ignition and fuel system analysis, alternative propulsion (e.g. hybrid, electric, natural gas), and more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Theory Forum.

Recent Automotive Discussions in the Automotive Technical Discussion Forum

Help with this TOYOTA COROLLA fuel Trim
05/28/2017 in the Technical Discussion Forum
First please take a look at this Scan data.... [Fuel trim] Model TOYOTA COROLLA 1NZ-FE 1.6L 2004 This thing is Lean at idle but at above 1500 rpm fuel trim comes back to single digit.. O2 sensor response to MAF Cleaner.. Please Look at 02 sensor at idle. ...
VTG Control Unit
05/28/2017 in the Technical Discussion Forum
[Transmission: 07 BMW X5 3.0si 3.0L] Good morning all, Does anyone know if this unit requires programming/encoding through ISTA/P or can it be done through ISTA/D? This is for ATC 700 transfer case unit. I am weary about programming through my Cardaq M b...
Ford relative injector flow test
05/26/2017 in the Technical Discussion Forum
[Driveability: 07 Ford F-150 Lariat 5.4L] Hello all . I have just updated my scan tool ( verus pro ) and noticed the relative injector flow is now there for ford vehicles . Just so happens I have an F-150 with a slight misfire . No codes , small amount o...
2003 Audi A4 Compressor Flutter
05/25/2017 in the Technical Discussion Forum
Car came in and customer requested a compressor to be installed because he could hear slight noise. Compressor replaced. He drove off. 6 months later comes back with noise at 2500 rpm, compressor flutter. All pressures look good, no fluctuations, noi...
2008 GMC Canyon 3.7l Thermostat issues
05/25/2017 in the Technical Discussion Forum
OK here is the short story. Vehicle comes in with a complaint of A/C Off warning and temp gauge all the way cold. OE T-stat is staying open. One of my techs replaces the t-stat with an aftermarket. Temp will rise to about 3/4 temp is between 210-220. Temp...

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