Jonathan_ED3

I've got a problem adjusting my new (from streetimports https://honda-tech.com/zerothread?id=2014912) TPS on a d16z6.

According to the FSM, at throttle closed it should be registering .5V, and at WOT it should be registering ~ 4.5V.

No matter which extreme (or any variation in between) I turn the TPS, it always and only registers 0V at throttle close, and a max of 3.3V at WOT. Tried two different Fluke MM, and two different stock P28 ECU's.

Battery voltage is 12.5, and when I test yellow/white against green/white at TPS harness, voltage is exactly 5V.

Anybody have any suggestions? I need to get rid of this TPS code!


Modified by Jonathan_ED3 at 3:01 PM 9/23/2008

obuhmyuh

sounds like your TPS is garbage, are you sure you calibrated it correctly?

Jonathan_ED3

That's what I'm trying to do - I'm trying to set it to the factory spec, but it seems there isn't enough adjustment allowance to get it set to .5v/4.5v.

obuhmyuh

by loosening the screws and and rotating it slightly? If your still not getting the right specs then i would say its your TPS or its ECU related.

Jonathan_ED3

Yes, I'm trying to rotate it clockwise or counter clockwise and set it at .5v/4.5v WOT, but it won't hit those readings in any direction or at any stop in between those.

I've tried two different ECU's, so I can only guess that the brand new TPS is bad - which is hard to believe!

obuhmyuh

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_ED3 &raquo;</TD></TR><TR><TD CLASS="quote">Yes, I'm trying to rotate it clockwise or counter clockwise and set it at .5v/4.5v WOT, but it won't hit those readings in any direction or at any stop in between those.

I've tried two different ECU's, so I can only guess that the brand new TPS is bad - which is hard to believe!</TD></TR></TABLE>

not really, i've ordered some that weren't working properly when the arrived, they're some-what sensitive.

JDM EJ2

I know Honda calls for it to be at .5V but I ordered one from Inline4 and I adjusted mine to .3V and its much better. Give that a try and let us know how that goes for you...

Jonathan_ED3

I can't get it to register ANYTHING other than 0.00v at closed throttle.

It always registers only 0.00V closed. Not sure what else to do but buy another TPS

geebs

That TPS is toast. the ECU is sending the 5 volts.. so that rules out the ECU.
Are you measuring the voltage at the TPS sensor or the ECU?
If you're testing at the ECU maybe you have a bad wire?

Jonathan_ED3

I'm testing at both the ECU and also at the sensor itself.

Something I'm thinking about trying is enlarging the holes on the TPS and seeing if I can get it within spec.

As far as I know, you have to set the WOT before you can set the closed throttle. If I can get the WOT dialed in after enlarging the holes, maybe I can get the closed throttle set properly.

I knew I should have just bought a used OEM TPS instead of going for a "new" chinese made product.

geebs

I used an old OEM TPS for my crx/b16 when i had idling issues..
I just slapped it in there.. and moved it around till i had 0.5 volts at idle

It could possibly be the TPS..

geebs

I actually might have one laying around if you want it..
just pay a few bucks for shipping and its yours..

Jonathan_ED3

I took off and reinstalled the TPS. I think the first time around I didn't have the arm lined up.

I got it adjusted just fine, although to get the closed throttle to hit the .5V that the service manual calls for, I had to slightly adjust the throttle plate stop screw.