• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

BBk TB install w/ idle issue

  • Thread starter Thread starter cobra1923
  • Start date Start date Mar 20, 2006

cobra1923

Member
May 6, 2005
68
0
6
Baltimore
Mar 20, 2006
#1
  • Mar 20, 2006
  • #1
I put in a 75MM BBk TB on my '02 GT. I already had a C&L plenum and everything ran great with the stock TB. The install of the BBK went easy and the car definately pulls a little more above 2500RPM but my idle is a little high now. I set the set screw according to the directions and it idled at about 1100RPM.. (with the stocker it idled around 700RPM).. I backed off on the set screw until it wasn't even touching the linkage and it only goes as low as 900 RPM.. It looks like the TPS in these aren't adjustable, any ideas why nad how to fix?
 

hotmustang331

Active Member
Apr 29, 2004
2,967
3
48
Bastrop,TX
Mar 21, 2006
#2
  • Mar 21, 2006
  • #2
Make sure to pull your battery cable for 30 minutes. Mine idled a little high for a while but the EEC corrected it when its relearning everything.

I have a BBK 75MM TB too BTW. Just let it idle for a while after you replugin the battery and crank her up. Besure to turn on the AC for a minute and let it get used to the load the AC puts on the engine.
 

speedfreak98r

Banned
Jan 31, 2006
0
0
0
Houston Area
Mar 21, 2006
#3
  • Mar 21, 2006
  • #3
I have the same TB too. Mine idles a little low actually. Did you happen to clean the black rubber stuff off of the t-body blade before you installed it?
 

cobra1923

Member
May 6, 2005
68
0
6
Baltimore
Mar 21, 2006
#4
  • Mar 21, 2006
  • #4
I didn't see any black rubber stuff? There was the gray coating to prevent buildup and I left it there? I think I need to attack the TPS voltage and see where it is first, then go from there. I will say that I think it dropped another 50-100 RPM today (could be in head though)
 

Grits

SEE!! I do have a neck!
Founding Member
Aug 25, 2000
2,013
0
46
Colorado Springs, CO
Mar 21, 2006
#5
  • Mar 21, 2006
  • #5
I had the same issue, i didnt have to adjust the screw, i just pulled the battery cable and let it reset... gott give it time to adjust
 
0

007

Founding Member
Jan 29, 2002
3,287
24
69
Broke
Mar 21, 2006
#6
  • Mar 21, 2006
  • #6
The TPS can be real sensitive. Move it a little.
 

laxdman20

New Member
Nov 20, 2003
95
0
0
Va.
Mar 21, 2006
#7
  • Mar 21, 2006
  • #7
Disconnected the battery cable on mine for about 30 min. Then let idle for a long time. After that everything straightened itself out.
 

hotmustang331

Active Member
Apr 29, 2004
2,967
3
48
Bastrop,TX
Mar 21, 2006
#8
  • Mar 21, 2006
  • #8
^Awsome .
 
You must log in or register to reply here.

Similar threads

7
Engine Random hanging idle
  • 706 Saleen
  • Feb 11, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
456
Fox 5.0 Mustang Tech Feb 19, 2026
86HO5.0
8
F
Trouble Shooting Sudden Shift of AFR at low RPM
  • Farva_84
  • Jun 6, 2025
  • SN95 4.6L Mustang Tech
Replies
8
Views
465
SN95 4.6L Mustang Tech Jun 8, 2025
Farva_84
F
A
95 Gt intermittent backfire
  • A_A_Ron
  • May 26, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
0
Views
404
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 26, 2025
A_A_Ron
A
O
Need a hand: Hanging idle with all new parts
  • Overused03
  • May 15, 2024
  • SN95 4.6L Mustang Tech
Replies
2
Views
1K
SN95 4.6L Mustang Tech May 21, 2024
Overused03
O
H
New kid on the block
  • HydraX
  • Mar 22, 2025
  • The Welcome Wagon
Replies
17
Views
689
The Welcome Wagon Mar 22, 2025
HydraX
H
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L 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?