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Throttle Position Sensor


cheekychimp Galant VR4.org Moderator
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Galant VR-4 org Post #: 633033 posted 04/11/08 03:11 AM     Remind Me!  Send Private Message   Edit Post      
How complicated are these? I have a 75mm throttle body that will eventually be going on the car. Wilson (who manufacture the TB) offer three TPS options from GM and FORD that are a direct fit to the TB.

What's my best bet? Re machining the throttle body so that the Mitsu TPS can be bolted up or can one of the above TPS options be spliced into the OEM wiring? I am using DSMLink so for the purposes of this question assume that we need to create a signal that works with a stock Mitsubishi ECU, not a standalone.

Link to the three TPS options

TPS options for 75mm TB

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powerplay
Yes Man
525/2000


Galant VR-4 org Post #: 633042 posted 04/11/08 05:16 AM     Remind Me!  Send Private Message   Edit Post      
The TPS is a varible resistor. Receives 5V and ground. The wiper arm sends a varying voltage to the ECU, depending on the position. The TPS varible resistance value is .22 Ohms to 4.9K ohms measured between ground and the arm. So any TPS that has 3 terminals with a fixed resistance of 4.7K to 5.0K ohms should work between the +5V and ground lines. I don't think this should be to hard to find.



Scott
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keydiver
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Galant VR-4 org Post #: 633107 posted 04/11/08 10:22 AM     Remind Me!  Send Private Message   Edit Post      
But, don't forget that some TPS's have an idle-closed switch integrated into them, which you *should* have, if possible.

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powerplay
Yes Man
525/2000


Galant VR-4 org Post #: 633110 posted 04/11/08 10:27 AM     Remind Me!  Send Private Message   Edit Post      
Good point Jeff!
You will want an idle-closed switch. It would be nice if ours was incorporated into the TPS.



Scott
525

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keydiver
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Galant VR-4 org Post #: 633301 posted 04/11/08 07:55 PM     Remind Me!  Send Private Message   Edit Post      
Just use a 2G throttlebody. I think they may be smaller in diameter though, but the TPS and idle-closed switch are integrated on a 2G throttlebody.

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cheekychimp Galant VR4.org Moderator
Director of Housing and Urban Development, and carbon/kevlar balls


Galant VR-4 org Post #: 633397 posted 04/12/08 03:09 AM     Remind Me!  Send Private Message   Edit Post      
Enlighten me please! What exactly does the idle closed switch do and if the switch is not integrated on the 1G, then where is it? What does it need to connect to? I need to work that out and doing any modifications preferably before fitting this TB.



Getting old sucks ... but it sure beats the alternative !!!

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keydiver
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Galant VR-4 org Post #: 633422 posted 04/12/08 08:55 AM     Remind Me!  Send Private Message   Edit Post      
The closed-idle switch on a 1G/GVR-4 is on the rear left side of the throttlebody, and simply shorts a wire to ground whenever the throttle is completely closed. It can cause a lot of idle surge issues if the ECU doesn't se it grounded.

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toybreaker Galant VR4.org Moderator
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1990/2000


Galant VR-4 org Post #: 633439 posted 04/12/08 10:35 AM     Remind Me!  Send Private Message   Edit Post   
Quoting cheekychimp:

What exactly does the idle closed switch do




good thread



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