Maybe, but let me ask a dumb question first...
What are your neutral pressures?
If the answer is "I don't know", perhaps you should try to turn your torsion bars up a couple turns each and see how it behaves.
Props to PADDO's AHC fluid replacement method!
- Thread starter Clunky
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
What are your neutral pressures?
If the answer is "I don't know", perhaps you should try to turn your torsion bars up a couple turns each and see how it behaves.
Yep, you're right I don't know what my pressures are. Still looking for a techstream to purchase.
Then chances are good your neutral pressures are way off. Crank up the bars two turns and then try h.
Ok, gave both sides two turns. No change besides the front being lifted almost 1/2 inch. Still same results going from N - H. If I turn the vehicle off for a while it'll go to H real quick but it'll only do it once. Is it normal for the front passenger side to be slightly higher than the driverside?
The side to side heights are affected by torsion bars alone. Turn back the high side one turn.
It sounds like gas bubbles continue to be your problem or you've got something more unusual going on. You really need Techstream. That makes this diagnostic work about 100x easier. There are cables available immediately. Just buy one of these and use the software from the thread on this forum.
Ok, I'll report back once my cable gets in.
shtbrwn86
SILVER Star
Ugh... I can't wait to tackle my AHC with new globes and fluid but other s**t keeps breaking and jumping to the top of the list.
So something interesting happened. I haven't moved the vehicle at all this weekend. I don't know if the temperature has anything to do with it but this morning it was 45 degrees. I got in to start it up for work and not even a second goes by when the vehicle goes straight to L. I checked the fluid reservoir and it is full. No fluid on the ground. L keeps flashing and won't go to N. I tried bleeding the point near the pump but I can't even get the bolt to budge at all. It's like someone welded it on last night and I'm afraid of ruining it.
I'll have my techstream this Thursday hopefully.
Well that should make the Techstream results a little more interesting! Anxious to see what you find. I think you'll make more progress once you have some insight into the system's parameters.
So I got my cable but I can't seem to get techstream to work. I followed everything on this thread How-To: TechStream In 5 Minutes - https://forum.ih8mud.com/threads/how-to-techstream-in-5-minutes.1034923/ but it seems like my laptop doesn't like it at all. Every time I try to boot up techstream my laptop crashes and restarts itself.
Can you load the oracle vm virtual box?
Ok, I turned off all my background apps and it finally started. Sorry for the crappy pics but here is what is showing.
Nice. Can you clear those codes (eraser button at lower left) and then see what it comes back with *(edit to add: after codes are cleared try to move into N)? I suspect the C1762 code will come back right away.
C1751 is basically a timeout. It's running the pump, but not completing the raise cycle. 85 seconds to get to N and 100 seconds to get to H. To me, that means the pump was able to run for that long and produce increasing pressure, which is a good sign.
Potential cause is improper torsion bar adjustment and fluid clog (blocked screen or gunk further downstream in the system).
Ok, I cleared it and you are right the C1762 code came back. Every time I clear it the accumulator kicks on. It'll run for a min and then turn off. I cleared it 3 times. each time it'll kick on but the vehicle just stays in L and the off light will start blinking. The C1751 code has not popped back up.
Ok cool. When the pump runs, can you see the pressure values change at all? How about heights? The data has some latency (values aren't shown in real time, so you have to be patient).
slight changes. WHen I clear the codes its seams like only the rear is building pressure
Ok, these 3 pics are from my last attempt at clearing the code C1751 just to give the pump a break. The first one is before I cleared the code. As soon as I clear the code the pressure drops and I feel the rear of the vehicle lower. The second picture is right after it settles and before I attempt at raising it back to N. The third pic is when the pump quits and the Code C1751 pops back up.
AWESOME! This is exactly what I was hoping to see.
I think this means:
1. Everything functions. Pump, pressure sensor, height sensors, accumulator, temp sensor. All good.
2. Good idea to give it a break, that temp was getting warm!
3. Your system is reacting as it should, just taking too long to build pressure. This is exactly what we expect when there is air within the hydraulic system. The air is compressible and requires a lot more volume to build pressure.
Path forward:
Accumulator is charging and reaches roughly the right pressure (much higher than front or rear pressures) indicating the system can build that much hydraulic pressure. Rear is at a reasonable height and reasonable pressure. Front height is too low and pressure is too low. If you bleed the front left and right sides, do you get any bubbles or air slugs?
Pump noise: Is the pump a bit screechy? Or is it quiet like normal?
Bonus question, sorry if this is repeated info: How old are your globes?
So bleeding the left side I got 3 bubbles and then clean fluid. Right side I got nothing but clean fluid. As for the pump, it's a low hum. The globes I'm going to guess have are as old as the vehicle lol.
