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Theres nothing behind the valve. The wife is watching something on Netflix streaming, so i need to wait until the computer is free.

I'd check the harness side of the dpf sensor connectors. It can be hard to tell if they are bad so they're often tested buy load testing the circuit at the ecu with a headlight bulb.

Im gonna have to look at a wiring diagram to answer that. The low air warning switch is on the parking brake valve. The buzzer may be also.

How does it run? Does it misfire and clatter? Does the rpm surge if you hold it at, say, 1500 rpm? If you turn up the idle knob all the way, it will run at 980 rpm. If you turn on the exhaust brake, can it maintain that rpm, or does it drop? Does the truck idle much, followed by the Dpr...

Manually would certainly be the easiest and cheapest route. A fifth wheel? Is this something you put together yourself, or are you outside of the US?

International uses a pump to pump from the aux tank to the main tank. Unfortunately that function is ecu controlled. It compares the level in each tank and pumps until they match. Maybe some other simple controller could be employed.

The dpf temp sensor connector s on the harness side tend to break the wires inside. This can cause the dpr graph to jump up likr this. Have you had the 8440/8510 recalls done? Has the itv been modified? Check these things. Does the truck regen ever? Is the tailpipe dirty with soot? Take the...

The 08-10 trucks are only different in that they all had air compressors, exhaust brakes, and dpf. Everything else is basically the same, iirc. when specifying a tcm, they're going to want the model and serial # of the trans, I think. I googled "allison 3060 ecu reprogramming" and found this...

Can you slap four 41" tires on there and see if it makes a big enough difference? The RS23-160 rear has 5.63, 5.38, 4.10, and 3.91 gears. So, exactly the same problem. If you can get the rear gearset out of a used truck, a gear r+r isn't hard (relatively speaking). Pull out both axles...

If the lines are free of air, the tanks will equalize. The lines will eventually free themselves of air while the truck is running. If you run it out of fuel, simply cranking it will purge the air. Some models have primer pumps, and you can use that to get fuel up to the engine and avoid...

Hi there. I addressed the speed/rpm issue in the other thread. For dual tanks, all Hino does is tee the pickup and return lines. I seem to remember a bulletin addressing an uneven tank draw issue, but I don't remember offhand. I'd have to look it up. If memory serves me correctly, I think...

The 07 338 had two different rear axles. If you have a 5.57 rear in it now, that means you have a RS21-145. Available ratios are 3.90, 4.11, 5.29, and 5.57. The 3000 Allison has the following ratios: 1st 3.49 2nd 1.86 3rd 1.41 4th 1.00 5th 0.75 In 5th gear, 50mph=1847 rpm 55mph = 2032...

Ok, let's see... 38" tire 0.75 overdrive ratio 5.57 rear gear At 70mph, you should be turning 2500 rpm. Hmm. Is your ABS light on?

Go to (a different) Allison dealer. Tell them someone stole the computer off of your truck. Get a new TCM, already programmed with 6 gears? I guess this would work. This is not something I've dealt with in person, I've only heard of it secondhand. The next easiest thing to do is to change...

The variable vane contoller? Not generally. That's just another failure point.