Manually 'helping' the IAC idle? - SRT Forums

**supermech21** · 09-09-2009, 07:34 PM

Anyone ever try to adjust the throttle stop on the throttle body to help the IAC work a little less? My local tuner wants me to:

1) Set the idle to 0.50 by adjusting the throttle body(car off)

2) Then unplug iac and see if the car will idle

3) Then view the learned value while car is running with IAC still unplugged

4) Make changes in the % target table until idles where id like.

5) Plug IAC back in so car will idle at 1200...

Seems to make sence to me(maybe i missed a step or too but i know what to do). I dont really ever see anyone talk about it but it makes perfect sence, any adverse effects? Any down sides? Any one do this?

nutz · 09-09-2009, 08:12 PM

still having problems with that huh?

if you adjust the screw (throttle stop) just do it untill you see a value in the throttle then adjust the IAC acordingly

I would venture to say if you have a buddy with an srt try to swap the TPS sensor to see if yours is bad it should show a value IDK why yours dosnt when closed

**supermech21** · 09-10-2009, 12:32 AM

Really the car runs quite well!

Goes on the rollers Monday for some pump gas numbers. The higher i take it in the RPM's the better it sounds.

Either way the local tuning it suggested this, i donnu. I bought a brand new TPS re wire and TPS sensor so if i need to go down that avenue i will...

**supermech21** · 09-13-2009, 08:58 PM

I raised it, actually quite well...With the MPx tb theres just a small set screw on the bottem.

Now at idle its at 0.51 - 0.80 ... Havent really played with the tune to much, but i think it feels slightly better.

nutz · 09-13-2009, 09:12 PM

Quote: Originally Posted by supermech21

I raised it, actually quite well...With the MPx tb theres just a small set screw on the bottem.

Now at idle its at 0.51 - 0.80 ... Havent really played with the tune to much, but i think it feels slightly better.

glad to see your reading some voltage now

if iT fluctuates (tps vots) you may need to raise it so 5-6% is closed and when the throttle is about 8/10 of the way down it reads 100% this will lower the amount of volts read by the ECU and slow or eliminate the oscilation and help with DFCO and all over throttle responce (all tables would need to be modified to see 5-6% or what ever at closed throttle)

**supermech21** · 09-13-2009, 09:53 PM

Well i was watching the learned value and it oscillated from -7 to -9 all the way up to 1 -2....Sop its getting better!

Getting pump gas dyno tomorrow, will update! :thumbs up:

nutz · 09-14-2009, 12:06 AM

Quote: Originally Posted by supermech21

Well i was watching the learned value and it oscillated from -7 to -9 all the way up to 1 -2....Sop its getting better!

Getting pump gas dyno tomorrow, will update! :thumbs up:

paint · 09-14-2009, 12:21 AM

Why would you want it to idle at 1200? Hell, my car only idles at 950, and I think thats high.

amdguy · 09-14-2009, 12:28 AM

Quote: Originally Posted by paint

Why would you want it to idle at 1200? Hell, my car only idles at 950, and I think thats high.

big cams?

nutz · 09-14-2009, 01:10 AM

I can only idle at 950 w/ 13", i could only see that high of an idle if the cam is big and the injectors dictate a minimal PW, some of the "reworked" injectors dont like small PW's