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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Reset 88 Fox body PCM/Computer after replacing the IAC?

  • Thread starter Thread starter The needs of the many
  • Start date Start date Aug 13, 2023
T

The needs of the many

New Member
Jul 25, 2023
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Aug 13, 2023
#1
  • Aug 13, 2023
  • #1
Hello. Idler Air control valve giving me fits- car starts, runs fine for a block or two- computer leans out fuel mixture, and IAC fails to adjust? What is the voltage at the IAC connector supposed to be? Took my IAC apart and gave it a good cleaning. From what I understand, you can't just bolt it back on, you have to reset/relearn any new sensor...disconnect the battery using a jumper, or simply disconnect and turn on the headlights? Really wish I could get some data online but it's just not available.
Any clairification would be great.
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
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nevada
Aug 13, 2023
#2
  • Aug 13, 2023
  • #2
I have cleaned mine and just installed with no issues.
 

Mcmahst

5 Year Member
Jan 19, 2021
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Laguna Woods CA, fort Mohave AZ
Aug 13, 2023
#3
  • Aug 13, 2023
  • #3
Never heard of having to do that. Try this link:

The Complete Fox Mustang EFI Sensors and Things

The EFI system isn't really that complex on a fox body Mustang, it has a few sensors, solenoids, relays and a computer handling all this input to strive for the...
www.foxstang.com
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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polk county florida
Aug 14, 2023
#4
  • Aug 14, 2023
  • #4
Any codes?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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Aug 14, 2023
#5
  • Aug 14, 2023
  • #5
IAC works on PWM so no set voltage to measure

Perform the base idle reset procedure. Give it a few drive cycles and then dump codes. Also, have you opened up the ECU and inspected the capacitors?
 
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