I installed my new 58mm Holley Tb, slotted and adjusted the tps to .62, where it was at stock. But now at WOT I get a PO123 code which is TPS high input. I got a max of 4.88 on my scanmaster, i've read its supposed to be below 4.9, and it is, but not by very much.

So, do I need to lower the closed throttle TPS reading down to like .50 or what. This is a new TPS btw.

Also, will I need a new tune for this larger TB. My part throttle shifts are all messed up. I dont know if it has to do with the TPS code or what.

 

Alright, I got the TPS down to about 4.20 at WOT and about .62 at idle. The throttle cable was too tight and i was reaching 100% throttle with about 1/4 pedal left.

I have my idle set at about 675 in nutral and about 575 in gear. Is this about right?

What should my IAC look like, or do I even need to worry about it?

I also got the throttle to close to about 1% if I slowly let off the throttle. I got it down to 0% but then the throttle was too tight so I had to readjust it. I figure if I just give it some time, the spring will age a little and hopefully close down to 0% again, if not, i'll have to adjust a few things. Im also useing the first hole for the spring, which is the tightest. The extra hole I ended up drilling was too much and wouldnt allow the throttle to open enough, but it's alright because it looks like it was manufactured that way.