mr_mustang23

i installed my 75 mm accufab throttle body today and here are a list of the problems im having thus after the install:

1. hanging rpms

2. idles 400 more than before

3. makes a whistling sound with partial throttle (need help with this especially havent seen much on something like this)

WTF DO I DO?????

thanks guys!!

StriderTacticaL

I forgot exactly what the fix was but I remember that this is a very common problem with an easy fix...i'm sure you will get help soon

devongarver

theres a hanging rpm fix in the stickies, read the stickies, the whistle is normally, they all do that with aftermarket ones, but i dont know why the idle would be so much higher, unless the computer wasnt reset.

devongarver

https://mustangforums.com/m_2625353/tm.htm

Bullitt5339

You didn't say what year your car was, but the higher idle can be a couple things depending on the year of the car.

If it's a 96-97, I think the TPS sensors could be adjusted in those years, not sure about the 98.

I know the 2000+ zero out the TPS sensor every startup, so if it's a 2000+, you may need to reset the computer, and let it relearn due to the additional airflow

Pohatu18

Did you get a CEL? I broke my TPS when I changed my TB and did the same as yours, idled high and hanging rpms. All aftermarket TBs tend to whistle my accufab TB only does it when 10%-15% or so on the throttle.

vanquish

This sounds like your problem:
http://paladinmicro.com/PalMFrame00.htm?wks=tba

mustangman281

The best way to set idle after a TB install is to unplug the IAC and set the set screw on the TB until the car idles 100rpms below where you want it to idle. Then plug the IAC back in.