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Tps And Map Sensor

Bruno P
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Bruno P Explorer

Bruno P

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Posted

Hi Im currently in the process in upgrading my throttle body to one with an 80mm butterfly for my r33 gtst. I noticed that the throttle i purchased need a tps (throttle position sensor) from a series 1.

Considering my r33 is a 94 model i was positve the tps I had was a series 1 but it doesnt seem so, my r33 gtst must be series 1.5 or 2 becuase it has individual coils, no amplifier and other things which seem similar to series 2 including the tps, which has 2 plugs but seems only one is in use.

Do I need a tps at all with my new throttle body, reason I ask is i read somewhere that with an aftermarket computer with map sensor that a tps is no longer necessary.

Can anyone verify as im a little confused.

Cheers

Bruno

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StealthX Veteran

StealthX

Posted
Posted

well im running map sensor ecu and my hand controller tells me my throttle position so yes you will need it

Nah man you don't need it. Just cos you're hand controller says so, doesn't mean it needs it.

You can tune a car based on just a MAP sensor fine. My car has a cable throttle (it used to have a fly by-wire) and it has no TPS installed, and is tuned perfectly. Would be handy to have a TPS for idle control, but you can work around it.

In short, you'll need a TPS sensor for the stock computer, but as soon as you have say, a Haltech, Wolf 3D, EMS, Adaptronic (maybe), Autronic etc... you can ditch the TPS.

HTH

blind_elk Grand Master

blind_elk

Posted
Posted

Most ECUs will require a TPS signal so it knows:

1. Throttle closed so the ECU can control "injector shutdown on overrun".

2. Throttle closed so the ECU knows when to activate "idle" programming.

3. (sometimes) when the throttle has been snapped open (acceleration enrichment).

BTW, I'm running Wolf, and use the TPS for all of the above.

scotty nm35 Grand Master

scotty nm35

Posted
Posted

TPS isnt required with an aftermarket ecu, it just helps improve the tune.

With drive by wire electronic throttles there is a resistor on the pedal telling the ecu what your foot wants it to do, that will do fine as a tps signal if you dont have one StealthX.

StealthX Veteran

StealthX

Posted
Posted

TPS isnt required with an aftermarket ecu, it just helps improve the tune.

With drive by wire electronic throttles there is a resistor on the pedal telling the ecu what your foot wants it to do, that will do fine as a tps signal if you dont have one StealthX.

Yeah I still use the pedal sensor for the 4WD system. Don't need one for ignition or injection...

Bruno P Explorer

Bruno P

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Posted (edited)

well thanks guys that has certainly cleared up a few things for me, got a few prices on an r33 series 1 tps and most wreckers around are asking from $75-$130 for a tps, and pretty much all of them are out of stock at present. To tell you the truth not sure if my Link ecu even has that feature that recognises the tps, although it is direct plugin, best way to find out how it runs without a tps is to unplug the tps,drive around and see how it idles,

Does anyone know if the tps from a r33 series 1 will directly plugin to series 2?

Edited by Bruno P

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