Working on 3.4 swapping my 92 4runner, but confused about the power steering. Correct me if I'm wrong, but I should be using the pump off of the 3.4? The 3.4 pump has only two ports, a high pressure w banjo bolt and a port coming out of the reservoir. The 3.0 pump has those two the same with an extra port out the bottom that splits into two hoses. What do I need to do to make this work. Any help is appreciated. Thanks

 

Does your Runner have rear wheel ABS??

 

Not sure. It never ran when I got it, so I don't know from driving it, but there's no fuse labeled for it or anything that I can see. How else would would you know? Does abs affect power steering?

 

The early rear wheel ABS uses PS hydraulic pressure to actuate the ABS servo.
That servo lies on the front of the passenger frame rail.and PS pressure hoses run through it.
The rear differential 3rd member should have a sensor in the top of it.
If you wish this system to remain operative, you'll have to keep the original hydraulic piping.

 

In the truck there looks to be only two hoses unless I'm missing something. Can I just hook up those two hoses to the 3.4 pump and call it good? Don't know where the extra hoses on 3.0 pump even went to. The previous owner disconnected it before I got it. Could they just be vacuum lines that aren't needed for the 3.4 steering pump?

 

What size hoses to you speak of???
Any vacuum connections would be small.

 

This would be the abs servo correct? Still not sure where those extra hoses from the 3.0 pump would go. Looks like there are only the two lines that go into the servo and those ones i could connect to the 3.4 pump.

 

Heres the 3.0 pump. The extra hoses that arent on the 3.4 are still attached. They're about 1/4 inch

 

I know some vacuum lines are bigger such as the brake booster line. Just thought maybe there was something like that for the PS.

 

Don't know why there'd be two though

 

Just looking through some parts and found this for the 3.4 pump. The banjo fitting has the some two hose connection coming out of it. So couldn't be vacuum lines.

 

Your images is indeed of the rear wheel ABS servo.
Some PS pumps are fitted with a unit with two small (quarter inch, or so) vacuum lines that run to a setup on the intake plenum that increases idle speed when the PS box is cramped, so that the engine might not stall.
That unit is what your last image shows.

 

So if I can connect those hoses somewhere on the intake plenum it should work properly? Only problem is that I can't just swap out the hose that originally was on the 3.4 pump cause it is much to long and gas a hardline in the middle, and the 3.0 pump can't be used because the pulleys can't be swapped due to the shafts being different (splined vs keyed). Would my best bet to try cutting and splicing the 3.4 high pressure hose to fit?

 

You might have to have a custom hose made up, IDK.
You can most likely live without the idle=up function.

 

Okay, yeah. It would probably be fine without it just gotta give it a bit of gas when at full lock

 

I think I'll just put in the 3.4 pump as is and see how it goes. Thanks for the help, you're awesome

 

Use the 3.4 pump. the 3.0 lines will work if you use the 3.0 bolt too, its a little shorter.

You can ditch the vac lines, the 3.4 does need them thats why it doesnt come with them. It controls its own idle.

 

Awesome, thanks for the confirmation