• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Throttle body (hole in butterfly?)

  • Thread starter Thread starter 98BLKGT
  • Start date Start date Apr 11, 2007

98BLKGT

Founding Member
Dec 23, 2001
322
1
0
Chicago area
Apr 11, 2007
#1
  • Apr 11, 2007
  • #1
Do you have a hole in your TB butterfly? I have a 75mm tb and the previous owner plugged the hole with a piece of tape.
(I am in a process of fixing a surging idle. I may have found a vaccum leak)
 

Aryan15

Member
Sep 22, 2003
236
0
17
CA
Apr 11, 2007
#2
  • Apr 11, 2007
  • #2
Yes, there is a hole.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Apr 11, 2007
#3
  • Apr 11, 2007
  • #3
And some guys do seal it up (with something better than tape) because of the whistle or idle issues.

Good luck.
 

bloopbloob

Member
Sep 27, 2006
578
4
16
Alberta
Apr 11, 2007
#4
  • Apr 11, 2007
  • #4
i know my stock tb had a hole in it, but i dont think my 70mm tb does
 

Flavadave4

Active Member
Nov 28, 2003
1,044
21
49
Utica, NY
Apr 11, 2007
#5
  • Apr 11, 2007
  • #5
I just got a 65mm TB and there is a hole.
 

98BLKGT

Founding Member
Dec 23, 2001
322
1
0
Chicago area
Apr 12, 2007
#6
  • Apr 12, 2007
  • #6
I'll be messing with my idle this week and I don't know if I should leave the hole open or closed.
So far to fix the idle I got the "Idle plate" that fits between the IAC and the TB and changing out my 30lb injectors for some used 24's with a MAF.
I also found a cracking old rubber cap thats blocking some Vaccum tubes under the upper intake manifold.
(BTW I might be looking into that "Notch above the rest" t-shirts)
 
You must log in or register to reply here.

Similar threads

Engine Stock TB - smoke test - leaking bad
  • R82148V
  • May 18, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
28
Views
2K
Fox 5.0 Mustang Tech Jun 5, 2025
R82148V
9
New from northern MN
  • 91firecracker
  • Apr 19, 2026
  • The Welcome Wagon
Replies
5
Views
137
The Welcome Wagon Apr 19, 2026
Noobz347
B
A/C Issues
  • Boats90GT
  • Jun 10, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
110
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 11, 2026
Mcmahst
D
Throttle Body Spacer
  • dropteeth
  • Dec 1, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
218
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 2, 2025
nicholase
C
C4 trans help needed
  • CPH89LX
  • Apr 26, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
6
Views
210
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 28, 2026
CPH89LX
C
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?