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

Help. What is the wire that is grounded to the header bolt on 90 mustang?

  • Thread starter Thread starter 90lxwhite
  • Start date Start date Apr 7, 2012

90lxwhite

I'm kind of a She-Man
5 Year Member
Aug 25, 2011
3,310
374
134
Between the Red and Rio
Apr 7, 2012
#1
  • Apr 7, 2012
  • #1
I just changed valve cover gaskets so I had intake off and when I put it back together it is stumbling and chugging at idle. Im pretty sure I have the vac lines hooked up right the only thing I can think Im missing is there was a wire that was grounded to the passenger side header bolt I do believe, well now I cant trace that wire down to ground it. Do yall know what that wire is? Please help. Im outta town and need to leave tomorrow.

thanks

mike
 

Rick 91GT

Mustang Master
Nov 29, 1999
9,692
95
99
PA
Apr 7, 2012
#2
  • Apr 7, 2012
  • #2
From the factory nothing is grounded to a header bolt, there is a braided ground strap that goes to the rear of the lower intake stock, and there is a orange wire that comes off the injector harness that also needs to go to ground.
 
R

rockyracoon

10 Year Member
Nov 23, 2005
874
27
49
margate NJ
Apr 7, 2012
#3
  • Apr 7, 2012
  • #3
yes as rick alluded to maybe someone had the o2 sensor ground hooked up there (orange wire) That wire needs to be grounded for proper 02 sensor function.
 
You must log in or register to reply here.

Similar threads

F
Electrical From scratch: alternator wiring
  • fox racer v2
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
0
Views
582
Fox 5.0 Mustang Tech Jun 23, 2025
fox racer v2
F
D
1985 Mustang GT Battery Wiring and Grounds
  • DienstXIV
  • Dec 22, 2024
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
854
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 23, 2024
85GTStangGuy
SURGING IDLE / NO IDLE CHECKLIST FOR 1996–1998 MUSTANG GT (4.6L 2V) - Work In Progress
  • Noobz347
  • Aug 30, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
753
1996 - 2004 SN95 Mustang -General/Talk- Aug 30, 2025
Noobz347
0
V6 to V8 Swap info
  • 02_2v_Curtis
  • Jan 11, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
759
1996 - 2004 SN95 Mustang -General/Talk- Jan 11, 2026
02_2v_Curtis
0
Engine GT40P questions and advice
  • sav22rem22
  • Mar 11, 2023
  • Fox 5.0 Mustang Tech
Replies
13
Views
4K
Fox 5.0 Mustang Tech Mar 31, 2023
sav22rem22
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?