What fittings read Neutral Pressure on AHC?

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A

agaisin

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Here's the overly expensive LSPV pressure gauge kit from toyota:
SPX Toyota | Tool Detail

I know I don't need all of those pieces, just trying to figure out what I do need - also Toyota doesn't list the specific descriptions for each piece so I could find it elsewhere.

I believe I need a pressure gauge meant for hydraulics that goes up to probably 2-3 thousand psi (found one on ebay for $15.00). I know I need some fittings like a nipple (replace the bleeder valve with this special nipple), and a 90 degree adapter but I have no idea what sizes and how to describe them so I could find them online.

Can anyone give me specifics on the pieces I need in order to read the pressure at front and rear shocks? I know some of you have done this before.

Thanks!
 
Yup, that's the kit I used 2 years ago. Can't remember which nipple adapter I used though. Would have to go across town to get to the kit, if it is "at home". Anyhow, you only need one gauge.

What about this kit ? Power Steering and Rack Tester
Don't know which adapters those are, but looks like a good selcection. Has the right range as well, you need just over 1000 psi and this one is 2000.
 
I second the groveling plea for someone to post the AHC pressure gauge fitting size, or better yet recommend an inexpensive aftermarket pressure tester KNOWN to work for the AHC.

The Star Products STATU22 power steering pressure tester kit is apparently the same thing as a Hoffman TU22APB, or variously TU-22A-PB (both Star or Hoffman). Can't find anything anywhere online about the included fitting sizes however.

I guess one might remove an AHC bleeder fitting and go down to the local auto parts store to match up size...
 
The ahc bleeders are M7x1 (Ø 7 mm, 1.0 mm thread pitch)
 
It appears that the Toyota LSPV pressure tester kit 7mm Adapter for this AHC Blleeder Plug fitting Adapter p/n 308335:

SPX Toyota | Tool Detail
SPX Toyota | Tool Detail

is discontinued and there is no replacement, according to the Reps at

SPX Toyota | How To Order

So the alternative is to maybe modify a Bleeder Plug to, say, weld it to a fitting that will mate to the pressure tester gauge hose.

Grrrrr...things are looking more and more like its time to dump AHC and go conventional....
 
Tinkerer said:
But maybe this SSBC A1704 Brake Pressure Gauge Kit will work: It has a 7mm x 1mm pitch brake bleeder fitting adapter, which should fit the AHC bleeder fitting port/threads, if it is long enough.

Amazon.com: SSBC A1704 Brake Pressure Gauge Kit: Automotive

With a hose between the fitting and the gauge, it may work.
Click to expand...
Looks like that gauge will only give a ballpark figure, being small and having a big range. And yes, there is no hose, but maybe you can get away with screwing it straight on? Is there space?
 
Really, its just the 7mm bleeder fitting adapter I need, to adapt to either this brake pressure gauge kit's 3000 psi gauge or the 2000 psi gauge in the power steering pressure tester kit I already bought. I already assume I will have to get some additional fittings or maybe have a hose made up, to connect the fitting adapter to the gauge.

The hydraulic hose shop I visited today had nothing like the 7mm x 1mm pitch flare fitting (bleeder plug size). Toyota SPX OTC says "discontinued". This darn AHC is turning into a costly PITA. If not for the vehicle roll control concern, I would have already yanked it out.

I'll post whether the 7mm bleeder fitting adapter in the brake pressure tester gauge kit works for the AHC bleeder port.
 
I don't think there is a vehicle roll concern without the AHC.
Go find a LC100 with good conventional springs & shocks to try. I think you will find out it is rather the other way around.
 
Maybe firmer shocks improve roll control, at least for transient conditions. I have not driven any other 100 series, I'm just remembering the Consumer Reports negative report about emergency handling in the first couple model years 1998-1999 LC (I believe), which may have been improved in subsequent years with electronic stability control added. But the vehicle CR tested originally was a non-ESC (or VSC or whatever) LC, not an LX - supposedly the LX's additional tricks using AHC for roll control improved things vs. the LC, at least the first couple years including 1999.

The 99 LX would not have any VSC at all if the AHC were removed. (ABS doesn't count) And I really don't want firmer shocks - I'd like to have less of the road surface telegraphed into my spine and organs, not more. This is not a race car, after all.
 
Tinkerer said:
...And I really don't want firmer shocks - I'd like to have less of the road surface telegraphed into my spine and organs, not more. This is not a race car, after all.
Click to expand...
That's why I keep the AHC, plus for (the coolness of?) the ability to hoist it up a couple of inches.
 
In a manual I've seen there are instructions on how to take the electric readings of the individual AHC sensors and convert them to a rough neutral pressure height.
 
Loyota said:
Is there way to measure it through the ODBII port maybe?
Click to expand...
There is. But only with the Toyota Hand Held Tester. Or Techstream i suppose. Otherwise, it works wonderfully with a LSPV Gauge Kit.

lexi4darin said:
In a manual I've seen there are instructions on how to take the electric readings of the individual AHC sensors and convert them to a rough neutral pressure height.
Click to expand...
That is only for determining when the sensor is in the middle position, the N-height. It says nothing about what your actual shock/gas-spring pressure is.
 
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