correct way to set up the tps on a r32 gtst?

[WHITE R32]

ive seen that u use a multimeter to set it once it reads .5 volts or something ... i did that and it wasnt any good..... also ive heard ppl talk about resetting the tps how is this done and does it work and what does it do exactly if anything at all.........just wondering how u guys do it and also how u set the idle air controller screw aswell... ive just been fiddling with it and trying to get it the best possible.....any help would be appretiated....cheers Jon

[BOOSTD]

Turn the TPS all the way to the right, slowly turn it left until the revs increase then back it off tad. (so its just before the rev rise point)

After setting the TPS pull off the plug from the AAC idle up value and turn the screw untill your revs are at 650 rpm( with the ecu in service mode( pot turned fully clockwise).......thats what the manual says! But I have found if you plug the AAC valve in and the revs increase it is set wrong. The best point it to keep turning it down untill it's just under the setting were the revs increase. So if the revs drop past the normaL level it will activate immediately.

After this clean out the throttle butterfly as its works on being cracked open 2 thou, any dirt and greasse will upset it.

Lastly reset your idle speed with the pot on the side of the ecu.

Erractic idle is caused buy the ecu not being able to go into closed loop mode. If your oxygen sensor is dead it will never idle correctly. The TPS should be between .43volts and .63volts for the ecu to recognise closed throttle.

Oh yeah, if your oil is dirty or to thick or thin they idle like crap to.

[blind_elk]

They way I do it:

insert 0.012" feeler blade in throttle stop.

disconnect plug from TPS.

connect multimeter (ohms mode) on bottom 2 pins of TPS.

adjust TPS until 0 ohms (probably switches between 0 and infinite).

reconnect everything.

[BOOSTD]

Nissan TPS is of variable resistor type, not switch.

[blind_elk]

BOOSTD,

There are 2 TPS, one is a Throttle Position SWITCH, the other is a Throttle Position SENSOR. Both built into the one unit, on the side of the throttle.

The SWITCH tells the ECU that the throttle is closed or WO. The SENSOR tells the ECU how much throttle is being applied.

[TomR33]

There is a switch in TPS too.

[BOOSTD]

With 3 wires out? Signal, Earth and Reference. So what you are saying is that the TPS's output at closed throttle is eathed/switched.....can't see how this varies from 0 ohms.

Do you mean switched in the sense-

10%=200 ohms

7% =170 ohms

5% =140 ohms

3% =0 ohms

1% =0 ohms ???

[blind_elk]

BOOSTD

The R33 might be different. But in the R32, there is a plug directly onto the TPS (this is the SWITCH), and there is another plug that connects to a short loom off the bottom side of the TPS (this one is the SENSOR).

The SENSOR is infinitely variable output, while the SWITCH is basically 2 x on/off switches (closed throttle, WOT).

[BOOSTD]

Yes the r33 is different, the switch isn't connected.

[WHITE R32]

so overall taking into account what everyone said how should i do it on my r32??? and is that what the screw thing is in the side of the ecu??? idle adjustment and also diagnostic mode settings??

[adam 32]

you shouldnt have to touch the TPS at all - what are you hoping to gain out of this?

[WHITE R32]

im just having a stalling problem and in a thread here ppl reported that it helped the problem alot and fixed a flatspot they had when cold also..... what started it was that when i fitted my safc the throttle would only read up to 57% and if i moved the tps it read to 100%...... just trying to sort a few little bugs out mainly....