Can anyone tell me what the exact voltage of the throttle position sensor(TPS) is supposed to be set at on my '04 s2k......my range of adjustment in closed throttle will go from (0.46 to 0.96) and at wide open will go from (4.5 to 5.0) respectively.....i just installed 70 mm TB and set the voltage at (.5 closed to 4.5 open) and the car isn't running or idleing right....running really rich and rough idle.....but as i increased the voltage to (.75 and 4.8) it felt like it ran much better although still rich at idle.....then the check engine light kicked on.....so i turned it back to my original (.5 and 4.5) and the light turned off and stayed off......i also watched my EGT temps drop back down around 700 degrees celsius at the lower voltage setting as it peaked as high as 740 with the voltage up right before the check engine light kicked on......why is my S running so damn rich???? my AEM wideband is telling me it is trying to idle at 11.3 to 1......(it used to be 14.7 to 1)i've adjusted the the air screw to no avail (nothing changes).......can someone who knows what they are talking about give me some insight on where to start first...i would appreciate it .......also how high can i run my EGT's leaned out on top end with this motor.......on my turbo mitsu.....i have them peaked at 860 degrees cel....why wont the S even approach 800??? now i am down to 700??? THANKS FOR ANY HELP!!

 

Closed throttle should be .5v and WOT should be 4.5V input to the PCM.

 

Just checked 2 cars via a Honda HDS tester. Voltage displayed on the tester was .25V at closed throttle, and 4.5V at WOT.

It's the 1st honda I've ever seen with less than .5 volts at closed throttle.

 

turbo = HOT EGTs

 

BUMP...

My closed TPS reading was 0.32/0.33V after I got my ProFlow throttle body back. I noticed after installation it was idling between 1100-1200.

Aside from this thread, the recommended settings have been blanket statements of 0.5 V closed and 4.5 V at WOT.

I lowered my closed TPS reading from 0.32V to 0.25/0.26 V and the car now idles around 900-1000. The byproduct of the WOT reading is now 4.38 V.

So what's the recommended closed setting -- 0.25 or 0.5 V? And in my case, should I set the closed setting and whatever the WOT settings is, leave it be even if it's not the recommended WOT setting?

 

Upon further research, the recommended TPS settings are as follows:

fully closed: approximately 0.30 V
fully open: approximately 4.5 V

 

the new throttle may gave different readings, but if you are using an EMS set according to yor car adn you should haveno problems. When i installed my ITB i had to adjust it its nott a big dealbut just make sure when the throttle is full opened that it does not read a 100%.

for refererence mine is:
Open : 4.78
Closed :0.38

 

You should set it up based on the closed voltage, the open should follow suit from that, but make sure you check it.

Although the voltages quoted above are correct (0.5 - 4.5v) there is a plus and minus tolerance either side of that as they can wander. It is normally about +/- 0.2v

If you are within tolerance and your idle is still high, then I would look elsewhere, like the ISCV, lambda etc...

MB

 

Maybe some more clarification of your problem might help. Are you still using the stock tps, if not; with the new tps how are you adjusting its output range?

Do you use the oem ecu or an aftermarket ecu? with aftermarket you should be able to set the range the ecu expects, allowing you to calibrate any tps. If you are using the oem ecu, you best bet is to continue to use an oem tps. HOWEVER i DONOT reccomend replacing an aftermarket tps on the tb with an oem tps, there is too much to screw up.

Also as far as i know (could be wrong) the oem ecu uses a pw controlled idle air stepper motor, and as such the adjustment screw should not be changed, as it was probably used for an intial calibration.

If you have an adjustment range in your aftermaket tps, you should set is to the oem range as mentioned above.

If this leads to problems, you should try your best to put the screw back to where it originally was.

Also make sure all your voltage meauring equopment is of high impedence and that you are not messing up your readings somehow.

 

I know this is a super old thread but I'm hoping to get some clarity. I changed my TPS due to an issue my car was having. The issue turned out to be something else but now when I'm adjusting the TPS, I can get a voltage of .30 when closed but that results with a voltage of around 4.15 at WOT. It sounds like I might want to shoot for the .50 at closed which would put me closer to the 4.50 at WOT. Is that correct?