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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.

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Recent Automotive Discussions in the Automotive HD/Fleet Forum

School bus brake drum
07/19/2017 in the HD/Fleet Forum
Asking the other School bus shops, is #65167b webb brake drum still available in your area? All our local vendors say they don't have it and Blue bird says the factory doesn't have any. This drum is on one of our older (99) All American. It's a spare bus ...
Sprinter issue please help, and thank you!
07/17/2017 in the HD/Fleet Forum
From: Mark [...]) Subject: : Elec: 08 Freightliner Sprinter 2500, Charging, Battery light illuminated 2008 Freightliner Sprinter 2500 Engine: 3.0 L / 6 cyl / Diesel / Turbocharged / DOHC Fuel Delivery: Fuel Injection Trans: 5-speed Automatic Transmission ...
Sterling Wiring
07/17/2017 in the HD/Fleet Forum
[Electrical: 05 Sterling Truck Acterra 7.2L] 2005 Sterling Acterra farm truck with C7 Cat. Crank no start. No current to ecm pin 70 (ignition key). Hook up ecm bypass cable and it starts. Can someone fax [...] or email me a wiring diagram for the key to ...
Cat fuel trim files? Now will not run
07/16/2017 in the HD/Fleet Forum
Installed new cat injectors from cat. Loaded the fuel trim files through cat et. started the truck and now it runs worst than ever. Cannot even drive across parking lot. Luckily I saved the old trim files and reloaded them seems back to normal so the ques...
ECM Controlled Fan
07/14/2017 in the HD/Fleet Forum
NAV 2003 4400LP VIN [...] ESN 1393226 . Cannot get ECM to cntrl fan solenoid. Pin 8 on gray cnntr body out of ECM should switch grd off and on to cntrl solenoid. B+ side of solenoid fed hot with KOEO & KOER. ECM sends grd. STEPS TAKEN: checked wiring,even...

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