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PostPosted: Tue Jun 21, 2005 12:25 am 
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Joined: Mon May 31, 2004 5:29 pm
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Location: London, ON
Okay, so here's the deal. I was reading the Chilton's manual and looking for the instructions on how to properly adjust my TPS. I know that the Mk2 G10t TPS is similar to the one found on an N/A G10 with an automatic transmission... continuously variable output with an idle switch.

Too bad that either I'm on crack or the instructions for the NA TPS aren't applicable to the Mk2 turbo cars since the tiny bit of miscalibration was giving my ECU grief, since it didn't know when I was at WOT, and me grief since I was running rediculously lean (I'm talking white plugs...)

So, seeing as how the Chilton's method doesn't work for the turbo cars, this is what I did to get things working properly again:

You'll need:

1. A phillips screwdriver.
2. A multimeter.
3. No more than 30 mins.

Procedure:

1. Ground the negative test lead of your multimeter.
2. Set your multimeter to read DC V... if you set it to read resistance and fry your ECU, it's not my fault.
3. Locate the idle switch output... should be the 3rd wire down from the top. Leave the TPS connected to the wiring harness and connect into this wire with your positive test lead.
4. Turn your ignition key to 'run'. Mind you there's no good reason to start the engine... in fact that would just be stupid. The engine doesn't need to be running to do this.
5. Considering that your throttle ought to be at idle at this point, you should get a reading of 0V.
6. Move the throttle position just barely off of idle. You should get a reading of ~12V. (so... keep in mind that idle=0V non-idle=12V)
7. Loosen the two screws holding the TPS in position.
8. With your throttle in the idle position, carefully adjust the TPS until your multimeter reads 12V, then even more carefully tap the TPS back until it just starts to read 0V.
9. Now you can tighten your screws... pay close attention to the multimeter readout since the TPS can move while you're tightening. If you get a reading of 12V while tightening, carefully tap the TPS (in the proper direction) again to fix the problem.

Hopefully this makes sense. It's a super easy job to do and only requires the standard tools that any do-it-yourselfer ought to have. (No thickness gauges and so on...)

This method only sets the idle position, nothing more. It assumes that the variable portion of the TPS is functioning properly and, in turn, will ensure that the ECU knows that you've got the pedal to the floor. :D

If you've got issues with the variable portion of the TPS, you'll need to download the T3 Supplement to read the diagnostics section in order to troubleshoot the TPS.


Chris

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PostPosted: Tue Jun 21, 2005 12:33 am 
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stickied and added more karma

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PostPosted: Mon Nov 05, 2007 2:00 am 
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Joined: Tue Sep 25, 2007 10:24 pm
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Location: Edmonton, Alberta, Canada
nothing comes up on the thread for the supplement?


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PostPosted: Tue Aug 11, 2009 2:35 am 
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Joined: Mon Oct 15, 2007 3:09 pm
Posts: 98
Location: Laval,Qc
CjDave ! And what about adjusting the TPS, for the reving ? I Mean Accelerating, my motor is hesitating if I raise the speed of the motor like at 2000 ( Example it is doing that a every motor speed ) if I stay at the speed the motor hesitate, but everything is fine ? TPS as dead spot or bad reading ? MAf Problem ? If I give it a kick on the pedal everything is fine and the motor go back to his normal Idle speed ! And Idle is fine running like new !

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PostPosted: Wed Sep 21, 2016 7:25 pm 
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Joined: Fri Dec 05, 2014 11:23 pm
Posts: 142
Location: SK
How can I test the TPS on my mk2? Also are any other sensors I interchangeable?


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PostPosted: Fri Oct 28, 2016 10:42 pm 
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Idle is fine running like new! :)
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