help with TPS adjustment, evoscan

[1Gina2G]

I have a 2G throttle body with the 4 pin TPS and I'm trying to find out if the TPS can completley be adjusted through evoscan?

what I'm confused about is the use of the 0.177" feeler guage and testing the pins for the idle postion sensor. Do you still have to do this with evoscan?

I know there's also a tab for Idle postion on evoscan for either 0 or 1, does anyone know which is which? I'd assume 0 is off and 1 is on.

 

[Tyeler18]

Just use the tps value and set your tps at 5% (if I remember right) and yes 0= off, 1= on

 

[1Gina2G]

thanks for the quick reply. I forgot to check percent but today I set the TPS using evoscan at .62 volts, with the throttle plate all the way closed, closest I could get it to .63 without going passed .64 and 4.95 plus at WOT

what about the IPS?

Also, what does it mean if the IPS value stays at 0 when the TPS voltage is set at .63 volts when close? Shouldn't the IPS change to 1 when the plate starts opening?

 

[steve]

I'd rather be sure that the IPS is switching where it should be than setting the TPS voltage and have to simulate the IPS.

 

[1Gina2G]

I'd rather be sure that the IPS is switching where it should be than setting the TPS voltage and have to simulate the IPS.

How should I adjust the IPS if evoscan says my TPS volts are at .63? Do you mean you'd rather check everything with a meter then the program? Just trying to figure out what to check, I read your thread about setting the TPS:

From what I can tell 2G's TPS adjustment procedure is different than what I've posted for 1G's.

2G's critical adjustment is the Idle Position Switch that's part of the TPS.
The manual has you place a 0.0177" (0.45mm) feeler guage between the stop screw and the throttle pulley to open the butterfly and then adjust the TPS right to where the IPS (pins 3 and 4) switches from closed to open. Then they have you verify that the TPS (pin 2 and 4) reads between .4 and 1V while the feeler guage is still in place.
Anything in that range is ok as long as the IPS is adjusted correctly.
There is no way to adjust the TPS voltage independantly of the IPS on a 2G that I can see.

Steve

Can I put the feeler in place and check the IPS with evoscan?

 

[steve]

Yes, just like you would be watching the ohm meter for the switch point you can do the same with EvoScan but unless you have a long datalogger cable I would think it's easier to use the ohmmeter in the engine bay connected directly to the IPS pin in the TPS and then check with EVOscan to verify the setting.

 

[1Gina2G]

I actually ran the data cable through the firewall temporarily, so I could bring my laptop into the engine bay

that's how I made sure the TPS stayed at .63 volts while I tightened it down.

If I put the feeler guage between the stopper screw, shouldn't the IPS value change from 0 to 1? would closed be 0 and open be 1?

 

[steve]

If I put the feeler guage between the stopper screw, shouldn't the IPS value change from 0 to 1? would closed be 0 and open be 1?

While I can't comment on the readings from EvoScan, since I haven't used it for this, that is the whole point here. You making sure that the IPS is switching from the one state to the other right at the point that a 0.0177in (0.45mm) fits between the stop screw and the pulley. So with the gauge out the switch should read one way and with the gauge in it should read the other.

What the voltage is here isn't critical to the factory code, they say it can be between 0.4v and 1.0v. If DSMLink isn't happy with the voltage you can using the TPS scaling but don't simulate the IPS.