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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

Bobcat T590 maintenance interval change
09/20/2018 in the HD/Fleet Forum
I have a new customer with a new Bobcat tracked loader. I just completed the very first PMI that's recommended at the 50 hr mark. Resetting the maintenance reminder went okay but I need to change the interval hours. Just the simple resetting returns it to...
Isuzu truck PCM repair needed
09/18/2018 in the HD/Fleet Forum
Hello everyone. I have a 2014 Isuzu truck NQR (VIN [...]) with 5.2 liter who need a PCM repair. No start, no data on the scan tool and power feed at PCM tested. It is like the module has lost his calibration or program. I would like to know if somebody kn...
2017 F250 6.7L Fuel pressure control valve value?
09/18/2018 in the HD/Fleet Forum
Can anyone tell me what would be a normal value for the fuel pressure control valve while cranking? I have this one that was filled with contaminated fuel ( was cloudy and smelled like varnished gas). Was driven in. Drained tank and replaced fuel filters,...
Loss of Communication
09/16/2018 in the HD/Fleet Forum
Navistar CE bus [...] build date 04-28-09. Put an accelerator pedal overlay harness in this. After that no comm with engine ECM. Read out in IP cluster says "Electrical Fault" all other modules showing on CAN. ECM will talk thru the bench programming set ...
Exhaust manifold
09/14/2018 in the HD/Fleet Forum
[Engine: 96 GMC C7000 Topkick C7H042 6.0L] Has anyone found a reliable replacement exhaust manifold, the left side is cracked on this 366. GM no longer sells it, D brand cracks within 3000 miles, on the same truck that the original lasted 170K.

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