Progressive power steering

[dragracer]

Do all 89 turbo cars have pps ?

Is there a computer and where its located ?

Any pics of rack?

Reason I'm asking I'm finishing my car and unsure if the rack has been switched. Plus I don't have the computer if there is one.

Thanks

 

[dragracer]

Anybody?

 

[89supra7mgte]

I dont know exactly how it works, but the tsrm shows the pps system in the diagrams. I know it uses vacuum on the pps switch to aid in easy of turning at lower rpms i believe. Not entirely sure though. check the tsrm for proper explanation

 

[Nick M]

A solenoid blocks or allows flow depending on speed. This is typical on all the ones I have seen, Toyota or not.

 

[whitemike]

Here's a crappy pic, car is a 91. You can see the plug there as well.

 

[jetjock]

...I know it uses vacuum on the pps switch to aid in easy of turning at lower rpms...

I'm afraid you're confusing the air bleed idle-up feature with PPS. Different systems with different functions.

...A solenoid blocks or allows flow depending on speed...

Not solenoid. Proportional control valve. Close enough for this gang though...

 

[89supra7mgte]

Thanks for the corrections i started thinking about that this morning. My appologies op for incorrect explaination.

 

[dragracer]

I understand how it works.
I just bought this car as a shell years ago which was pretty much stripped.
Bolts on rack were loose and was unsure if it was swapped.
Where is the computer mounted?

Thanks for the rack pics.

Thanks guys

 

[hvyman]

The computer is in the passenger kick panel.

http://cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=15

 

[dragracer]

Thanks

 

[Canuckrz]

Is it possible to convert a pre89 over to it? Or is it not worth all the hassle?