I'm trying to do the TPS calibration, only the guide in the Tech Articles section is a bit vague.

It says to make jumper wires and read the TPS voltage at closed throttle, WOT and then gradually increase throttle.

OK, jumpers where? Jumper the TPS sensor itself and then plug the harness back on and take the readings?

Take readings from where? There are 3 leads and doesn't say anything about which ones to tap into.

Details...Details...

 

BUMP!

 

I actually did this yesterday and didn't have to use jumper wires or unplug the connector. Heres how I did it:

1) Put the position of the key to 'on' but don't start the car.

2) On the back of the TPS connector were the wires go into, unclip both clips to open the swinging plastic piece that keeps the wires and pins in place (hard to miss).

3) Set your digital voltmeter to 20vdc and with the clip (plastic piece) open, insert the black lead into the middle terminal and the red lead into the top terminal. You might have to wiggle it until you get a steady reading.

4) Your TPS voltage should read 0.54v or slighly higher. The closer to the 0.54v the better the throttle response will be. If its off by alot, loosen both torx screws on the sensor just enough to were you can rotate it for adjusment. Once the adjusment has been made, tighten the screws down and your all set.

Hope this helps,

Phoenix

 

Thanks a bunch!

I actually have popped that plastic cover off before but the clearance with the wires looks way too tight. I will probably use the jumper method but you answered my question about which wires to read.

As much as I'd like to go do it right now (Not uncommon to find me outside in the dead of winter at 4AM working on something), I'm dead tired and have to be up for work in 3 hours, so I'll post the results tomorrow.

Thanks again!

 

No problem. I had a hard time using jumper wires since my friend had to be there to hold them in place while I was reading and adjusting the sensor which is why I preferred this method. The wires in the cap are surrounded by a very soft spongy rubber protective 'cap' and since the leads are pointy, they should 'slip' in just enough to come into contact with the pins with no trouble, the pins are crimped down tightly btw. Just my .

Phoenix

 

Phoenix!!! its about time I see someone on here give a good answer.
I just pushed my probes in the plug following the wires. The only reason they don't recommend this is because you could damage the water resistant seal on the plug. GREAT answer Phoenix

 

I discovered that the probes DO displace the water resistant plugs. A much safer method is to take a smaller sized paper clip break it in half and stick those in as jumpers.

Back on subject though, I'm pretty sure my TPS is bad .

I measured the voltage at closed throttle at it said 0.48 so I was like crap time for a hex wrench. I tried adjusting the SOB and I couldn't get but two readings which were 0.48 and 0.90.

So I completely removed the TPS from the TB hooked up the VOM and slowly started opening it up. It got to about 0.48, then even the slightest increase after that made it jump straight to 0.90.

Even gradually increasing after that resulted in erratic readings. The voltage would often dip down before it started climbing again. I think this plays a big part in why when my car is cold started, giving it just a little bit of throttle to try and get the engine heated up makes the engine bog and studder like it wants to stall, and you have to give enough throttle to get it to around 2000RPM before it holds a steady rev.

I highly doubt this is normal TPS behavior from what I've read...

 

you need to check the resistance with it off the car. if at any point you're test displays a CLOSED CONNECTION (or .1) then the TPS is bad. you should have SOME resistance (not voltage) from closed to open.

 

Phoenix,
GREAT write up. I did EXACTLY what you wrote and it worked SUPER. I also took some pictures that I will link to below so that others can view your words in pictures.

 

Careful with this method guys. The more often you do it, the harder it will be to get the probes to make contact.