1jztts

how do I increase the idle speed on the 1jz?
My ps pump is acting up and I have no power steering under 700rpm.

SC300_704

iTrader: (5)

you can adjust the throttle body cable.

tritron

You can change throtle position sensor or add vacuum line bypassing idleup valve on pump

shajbot

iTrader: (3)

On the throttle body there are stop screws for the throttle cokc

qksl2

Adjust the TPS, not the throttle cable or set screws. A higher TPS voltage will have a higher target idle duty.

Ian

1jztts

where is the TPS

yenanlexus

It on the right side (you standing and facing of the front car) of the TB. It the black part.

lemmiewink

Whoa. Hold on a second. I'm not entirely sure you are correct.

To my understanding, the TPS is to let your computer know when it is on idle or off of it.

That is pretty much it. If you mal adjust it, it will either think it is in idle when its not, or off idle when its not.


The only way I know to raise idle is to do a couple things.

1) drill a small hole in the throttle body to allow slightly more air in when its closed

2) Adjust the stop screw so that it pushes the throttle body slightly open to allow more air in.


If you do the second option you MUST re adjust your TPS as per FSM specifications. This way, the tps compensates for the raised rpm, recognizing the new value (>700rpm) as the new "idle".