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Automotive HD/Fleet Forum

Professional automotive forum for discussion of heavy-duty trucks, buses and other on- and off-road equipment, and maintenance of automotive fleet vehicles. Discussion topics include fuels and lubricants, hydraulics, performance, on-board diagnostics, powertrain, power distribution, anti-lock braking and stability control systems, and best practices as they relate to heavy duty and fleet maintenance. This forum is for experienced automotive repair professionals only, membership required.

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

Recent Automotive Discussions in the Automotive HD/Fleet Forum

2010 Ford F650 6.7L Bus new problem Speed Control
12/10/2018 in the HD/Fleet Forum
Hello Guys, I just got some help to fix the doors from you guys. Thanks. I know need to fix the Cruise control or as they call it Speed Control. I do not have the Powertrain/Emissions manual which seems something I'll want to get at some point. We have th...
2010 Prostar With Cat Engine
12/06/2018 in the HD/Fleet Forum
Service writer handed me an R/O today for regen issues on a 2010 prostar. I was pretty amazed to see it had a cat ACERT engine. Has anyone else ever seen one? I’ve worked for international dealer since 2009, and have never even heard of such a thing....
Excessive Diesel Fuel Conditioner
12/06/2018 in the HD/Fleet Forum
E-Zoil Diesel Aid. The entire 8 oz bottle went into a 55 litre tank of a 1992 yes '92 Jetta TD. I did it. Reccomended dose says 8 oz to 120 US gallons for gel or wax. This little bottle looks like a one shot. I guess it is kinda a one shot for big truck t...
2005 F650SD wiring
12/06/2018 in the HD/Fleet Forum
[Electrical: 05 Ford F650 7.2L] 2 questions 1st one is what turns the dome lamp on and off besides the dimmer switch I cannot find anything in the wiring diagram. Door latch assy? and second the a/c compressor does not work and there is no temp. control ...
Broken Rocker Arms
12/05/2018 in the HD/Fleet Forum
[Engine: 05 Chevrolet W4500 Tiltmaster W4S042 5.2L] This truck is the same as an Isuzu NPR, was towed in for a crank no start. Snapping noise when cranking, sounded like a valve being sucked open so I pulled the valve cover. #2, #3, and #4 exhaust rocker...

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