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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

2001 4.0L Ranger Spark Plug problem
09/24/2018 in the Technical Discussion Forum
Hello, TDF I seldom have a problem I can't solve but this one is kinda weird. One of my client shops took in this 2001 Ranger 4.0L XLT to fix a CE light/misfire complaint. Turned out the spark plugs had been threaded into the head only part way, causing c...
200CID ford (1966) burn time short. Remind me
09/24/2018 in the Technical Discussion Forum
Hi all. got this lobbed at me...it needed carb work (could hear the vacuum leak down the throat on tip-in...complaint was bad tip in hesitation then gets past it and goes normal). Accel pump worked ok, plugs were new, cap and rotor fine. So before I got a...
2006 650i BMW valley pan bolt
09/24/2018 in the Technical Discussion Forum
This first time customer had been driving it for many years with the valley pan leaking coolant and on top of that was topping off with water. So now I am faced with 5 of these 6mm bolts that are frozen solid that don't want to loosen. I have drilled a di...
Passkey 2? Never seen before
09/24/2018 in the Technical Discussion Forum
[Electrical: 93 Buick Riviera Luxury 3.8L] [1993 Buick Riviera Luxury, BATT/Charging/Starting Schematic] is the diagram for Passkey module. From my understanding the fuel enable signal is a 50% duty cycle at 50hz. Well from the module I'm testing it's a...
VW Transmission Code
09/24/2018 in the Technical Discussion Forum
[Transmission: 06 Volkswagen Jetta 2.5 2.5L] Can someone familiar with Volkswagen Transmission 09G aka Aisin TF60SN enlighten me as to what if any the difference in code HRM and HFU are? I'm needing a replacement for a 2006 Jetta 2.5 and seems to me HFU ...

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