pwr steering on mx83 1jz

[Maverick]

hey guys, i`ve got a 1jz powered cressy and the steering is super light, ie it has no feel and i think possibly the pump pumping too much pressure into the steering rack. it is a standard 1jz pwr steer pump. Is there anyone else who has the same issue and is there a way to fix it????

cheers!

[Cressid@]

I have jzx81 rack in my car, it has a pressure sensor? where as speed goes faster, the steering gets harder.
I am not sure if a normal mx83 have such? check for any unplug plugs on the driver side in the bay just below the strut.

[Gavatron]

MX83's didn't come with progressive power steering. JZX81's have a ECU and a solenoid valve on the rack to reduce the assistance once up to speed.

PlacentaJuan on here has had some success with a smaller diameter pressure hose to the rack. You lose full assist at low speeds this way too though.

[PlacentaJuan]

yea check out some of my threads i spent a long time fucking around with this.

after my first power steering line started leaking i put a double size restrictor in and that made no difference.

after that one died i got a line made up in 1/4 ID and that made a big difference.

the power steering is still light enough for 1 handed highway cruising, but not so light that you lose all feel, its just about perfect (could do with a *little* bit more restriction but theres no way im going to fuck around with it more)

anyway keep an eye out for me at toyotafest and you can check it out.

i would post up pics on my thread but bigpond is being realyl gay at uploading to optus webspace.

[Geoff897]

I got a similar issue with my 1jz Mx83 where sometime the steering is super light and tracks heaps. I replaced steering rack all the bushes Ball joints, top plates and still having the issue.
Im going to replace the Damper soon, Ill let you know if that works.

[PlacentaJuan]

by damper do you mean the flexi metal part that sits inside the hose?

some people call it a silencer also but if thats what you mean i had that changed to one about 2 times as long and it made no difference.

[jeffro ra28]

Sorry to hijack. This however interests me as i am attempting to use a 1jz power steering pump with AE86 power steering rack.... Interesting thread, may consider running smaller lines :d
Can anyone see a problem with using a possibly dimensionally smaller internal volume rack with a PS pump suited to a larger rack?

Kind Regards
Jeff

[brett_celicacoupe]

when i did a conversion for someone (1JZX83) i just powered the solenoid on the rack from an IGN source.

thats the "hard" setting but its perfect

[ae95]

by damper do you mean the flexi metal part that sits inside the hose?

some people call it a silencer also but if thats what you mean i had that changed to one about 2 times as long and it made no difference.

i think hes referring to the external dampener (gas/oil strut thing that bolts to the rack)

[PlacentaJuan]

^aah series 1 mx83.

series 2 doesnt have a damper.

[lexsmaz]

Was the steering fine before the conversion ? If it was always pretty light ( as in lighter than normal ) the rack is the issue, possibly a fault with the torsion bar setup in the rack which controls fluid flow / pressure through the rack ..

I have never done this conversion or looked into it, but i was thinking why not adjust the pressure relief valve in the pump ? .. or change the pulley sizing, not easy i realise ..

With these restricters in the line, does anyone fit a bleed / return line near the restricter as i would think the build up in pressure in the line would be huge & the power drain on the engine with the pump pressure constantly high would not be a good thing either ?..

My 2 cents worth ..

[Geoff897]

i think hes referring to the external dampener (gas/oil strut thing that bolts to the rack)

Yes that correct series 1 Mx83 with the damper.

[hecate]

Do GX81's also have the variable power steering?

[thegreatestben]

My chaser (gx81) didnt but it was only a 1gfe. can't rule out possibilty in 1ggeu/1ggteu vehicles.

[jeffro ra28]

Dont most PS pumps have an internal pressure releif valve?