Search results

I have an MTV and disconnected M wire only. Now goes to 82 psi hwy(using a very cheap pressure gauge). Problem is, now when I turn off the truck the quick release valves open on the front axle and the rear most axle. My front right tire goes down to 50 psi and my rear right tire goes down to 55...

Checked the sensor, had some gunk, also inspected all orings in the PCU. Reassembled everything and same error. Did check the relief valve while functioning and it appears to be correct as pushing or pulling on the plunger resulted in less dump valve air release. One time the controller...

Unfortunately without sensor specifications I'm guessing on proper sensor voltage. Heck the 0-150 sensor is .5-4.5V for the recommended versions. Being that my sensor does inflate the tires to 55psi on highway that makes me think it may be okay but it's possible low pressure readings are not...

Wonder if the CTIS unit I bought is programmed for a different relief pressure? Anyone know what that additional sticker means? This was for an lmtv and I have a MTV so there are 3 dump valves vs 2....wonder if there is a programming difference causing the issue.

Was looking at my 2007 A1R MTV today requarding this and it doesn't have that same brace... almost looks like the housing could come off just by moving the trans aux cooler lines. Not sure if it has the updated sleeve bearing or not.

For sure on proper input. I tapped the wires so reference voltage was being supplied by the controller.

Do you know if that sensor is gauge pressure or atmospheric? I get .553V with no pressure in the system, truck off. If atmospheric I should have .739V for my elevation. If gauge, that means there could be pressure on the sensor, faulty sensor, or we don't have the correct scale for the sensor...

Awesome, that give me a few things to check out. No I didn't remove the sensor but knowing that data I can bench test it. I know I have some very small leaks on the wheel valves I haven't rebuilt but they are very slow (tiny bubbles slowly forming).

Checked the relief took it off and manipulated it, it's in great shape, no clogs, moves freely. The system does deflate the tires quite quickly and quick release valves seem to work as intended. 1) Faulty PCU relief valve - Checked and as far as I can tell this is good to go. 2) Leaking upper...

Getting a new software and hardware to do that is on my list of things to do, still waiting for my title and registration to process through before I spend more money though

It does sound like it's working properly, the controller just doesn't like that a pressure is slightly out of bounds on the relief valve. Atleast my best guess at this point. Manually actuating all the solenoids, all are functioning properly best I can tell.

My truck didn't come with a CTIS controller but I found a "probably broken-untested". Plugging it in and it seems to work as it should, electrically at least. I had a missing quick release valve for the front axle, then both hub breathers were disconnected, then found a hub seal leak, then the...

Well you were right about it being a valve. Looking closer it appears to be an intentional bend in the little lever. It rotates 180 degrees easily and it appeared to back flow. Still seems to run itself dry though when I put back into original position. I'll work on checking that return line next.

This is the one I have. That little metal tube sure looks like an overflow.

The pump does work normally until it runs out of fluid. Thanks for all the other info. I'm not sure mine is a sealed system as there is a short metal tube to the right of the handle. I think this may have been and a1 change as others I've seen have no tube?

When using the manual pump for any operation, it will run empty and not pump any longer. Thinking the fluid might be a little low, I refilled the manual pump tank, but I'm noticing it's pumping fluid into the air over oil pump reservoir, this caused it to overflow. Guessing is a check valve...

I don't have access to the A1R documents but it seems this QS4 version is the correct one for my truck. Dimensionally it's the same and the coil has the same resistance. I do have a single orifice to the intake. It bolted up the exact same also, currently fully installed. The replacement...

Was considering it, but may just go this route https://adaptiveoe.com/dot-lmtv-fmtv-front-brake-and-ctis-hose-upgrade-a0-a1/

This is for the frame to hub, but there are 3 sizes, 13/32 for brake, 1/2 for ctis fill, 5/8 for vent. Those are the hose sizes, the fittings are more complex.

I'm having a hell of a time spec'ing the correct hose. When selecting 100R5 (air brake hose) they have no compression SAE fittings available. Using removable fittings, they are still limited and cost is $132 for the hose. It's not a brake line so other hose could be used but not seeing a good...