Low IAC

[Fox Slaughter]

I am running between 5 - 8 IAC counts on a warmed up idle.

Any ideas?
Adjust the blades?

[masterfab]

I am running between 5 - 8 IAC counts on a warmed up idle.

Any ideas?
Adjust the blades?

What is the rpm your idling at?
Is your car cammed ?
Do you have a ported or hole drilled on your TB?

Do you have a way of data logging and posting. Id need to see your tps volts and the tps %.
That being said the more you open your tps tbe less you will read on your iac because it wont need to makeup for any air at idle.
If you close it alittle it will open the iac giving it more air and raising you iac count.
For a cammed car a iac of 45-65 is normal.
For a stock car a iac count 120-135 is ok.

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[Fox Slaughter]

No cam.
Stock TB with nothing done to it.
Car is idling at the commanded 800rpm.
TPS %0
TPS .65v

[masterfab]

No cam.
Stock TB with nothing done to it.
Car is idling at the commanded 800rpm.
TPS %0
TPS .65v

Ok adjust (close your Tb till it reads around .049-.053
When you do this make sure the throttle body blade dosnt stick shut. Snap the blades closed a couple time after adjustment to be sure it dosnt stick shut.
Ounce you have done that then reset the tps. By doing the fallowing.

Unplug the tps after you have lowerd the tps volts.
With the tps unplugged turn the key into the on position for about 7 secounds.(do not start)
Then turn ignition off. And plug sensor back in.
Ounce the sensor is plugged back In. Verify the tps is at 0% and the tps voltage is within the rage I stated above.
Then start car and tell me what your iac counts are.
.065 volts is pretty high.
Hope that helps and fixes your problems.
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[Fox Slaughter]

Where exactly is the blade adjust screw?

Is it the screw that the bracket where the cable connects to rests?

http://www.golenengineservice.com/do...es/Adj TPS.pdf

[masterfab]

Im sorry I automatically assumed you had a ls1 motor. Im not sure if this will work on a lt1. Or how to adjust it. I apologize

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[Fox Slaughter]

Its okay I think my TPS is fine anyways. Looking at the log when I have the WOT its reading 100% at 4.7x volts.

Could it be the IAC needs to be reset?

Reset the IAC Position

• Depress accelerator slightly
• Start engine, then release accelerator pedal, run engine for 5 seconds
• Turn ignition "OFF" for ten seconds
• Restart engine and check for proper idle operation It is NOT recommended to to push or pull on the pintle of an IAC that has been in service. The force required can damage the threads on the worm drive. Also, do not soak the IAC in any liquid cleaner or solvent, as damage may result. When installing a new IAC, you may move the pintle to match the measurement of the old one. The force required to move a NEW valve will not cause damage to it. Use engine oil to lubricate the o-ring. Tighten attaching screws to 27 lb. in.
  
  From Shbox.
  

[hoogiesngrinderz]

There is a plug on the TB that needs to be removed to get to the adjustment screw.

It isn't uncommon for the throttle blade shaft to wear out the bushings and allow excess air.