• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Erratic tach after new distributor install?

  • Thread starter Thread starter Great68
  • Start date Start date Jul 7, 2004

Great68

Founding Member
May 16, 2002
691
0
16
Victoria BC
Jul 7, 2004
#1
  • Jul 7, 2004
  • #1
I have an Autometer Sport Comp 2 5/8" Tach, and ever since I installed the MSD Pro Billet Ready-to-run distributor, the tach is very erratic at the lower rpms (especially at idle). It used to work just fine with the old distributor and pertronix system.

Could it be that I am using a Pertronix coil? I think I read somewhere on autometer's website that all ignition parts be matched. Think buying an MSD coil would fix it?

Thanks guys,
I never bothered asking earlier because I had bigger problems with the car to deal with at the time.
 
V

vobraman

New Member
Dec 2, 2003
144
0
0
Jul 7, 2004
#2
  • Jul 7, 2004
  • #2
Check the ground wire from the tach.
 
You must log in or register to reply here.

Similar threads

6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
713
1965 - 1973 Classic Mustangs -General/Talk- Saturday at 9:06 AM
gray owl
G
P
Engine Carb'd 88 GT, need centrifugal advance, will an '85 Distributor Work?
  • pindude80
  • May 12, 2024
  • Fox 5.0 Mustang Tech
Replies
11
Views
1K
Fox 5.0 Mustang Tech May 13, 2024
limp
Progress Thread Progress Thread- From6to8's 1994 Cobra Supercharger install
  • from6to8
  • Sep 25, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 20 21 22
Replies
420
Views
9K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 6, 2026
from6to8
SURGING IDLE / NO IDLE CHECKLIST FOR 1999–2004 MUSTANG GT (4.6L 2V) - Work In Progress
  • Noobz347
  • Aug 30, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
817
1996 - 2004 SN95 Mustang -General/Talk- Aug 30, 2025
Noobz347
H
For Sale MSD 6AL, Distributor, and extras (Menasha, WI)
  • hockeyjockone
  • Aug 22, 2023
  • Engine and Power Adder
Replies
0
Views
1K
Engine and Power Adder Aug 22, 2023
hockeyjockone
H
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific 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?