I am used to the TPS on Thirdgen TPI setups where you play with a multi-meter to make sure that the TPS is adjusted properly. I am planning on installing a 52mm TB on my SS and am curious if there is an adjustment for the TPS and what it should be?

I saw this kit on ebay, but kinda figured it was just a ploy:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=33557&item=24 35366828

If there is a tech article already written on the subject the link would be greatly appreciated. Thanks again

 

The LT1 PCM differs from the 3rd Gen setup, in that it can read the closed throttle voltage as you turn the key on, and set that as 0% throttle position (TPP), then prorate from there to get 100% TPP. The spec requires that the closed TPS voltage be between 0.20 - 0.90V. I think a lot of people have found that they get the best results with TPS closed throttle voltage in the 0.60 - 0.67V range. Not sure why that would be so... just seems to be the general feedback. In that case, if you don't see something close, you can slot the screw holes on the existing sensor and make it "adjustable".

When installing a new TB, I would recommend that you put a scanner on the PCM, and first adjust the throttle stop screw to give you an IAC count value in the range of 20-40 counts, when it is idling at the correct RPM, then check the TPS voltage to see if it is within range.

 

What kind of a scanner are you referring to being connected to the PCM?
Also I am guessing that I would measure the TPS Voltage the same way with just a multi-meter.

Thanks again

 

You can read the TPS voltage with a multi-meter. But you can also read TPS voltage, TPP, IAC counts and accurate RPM with a hardware type scanner. You can get them from AutoXray, ScanMaster, or Actron... in addition to the more expensive stuff like the SnapOn, Tech-I or Tech-II factory scanners, etc.

There is some additional info in this link . Some of the embedded links are out of date already, but the info is still OK.