digital holley shift light rpm 0 periodic - Ford Mustang Forums : Mustang Forum
LinkBack Thread Tools Display Modes
post #1 of 1 Old 07-13-2018, 09:05 AM Thread Starter
Registered User
theYman's Avatar
Trader Feedback: (25)
Join Date: Nov 2013
Location: Medina Ohio
Posts: 887
digital holley shift light rpm 0 periodic

I have a holley sniper shift light that just recently started jumping all over with rpm reading. I have put 2 other tachs on it with little rpm variance no drop to zero. I have installed a new distributor, TFI, coil. I also have monitored voltage at the coil on the + side and same voltage as battery when running no indication of dropping. I have rewired the shift light with all new wiring and still does it. Weird thing is when I switch over to my Summit ignition box, with either coil, the shift lite no longer does it all. MAYBE a bad poorly adjusted ignition switch? I'm at a loss. please help.

347 Stroker/ TW170 heads /TrickFlow R intake/ FordStroker cam/Longtubes Astro A5
The thick CLOUD of tire smoke ,the SMELL of burning rubber,and the CHEER of the crowd ....PRICELESS.
$90.00 fine for an awesome burn-out,worth every penny...
theYman is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forums : Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
autometer shift light not working ristang General Mustang Tech 0 07-27-2017 08:06 PM
For Sale 5" RPM Tach w/ Shift Light and Mach 460 Unit kdCoupe Electronics and Entertainment 2 04-20-2017 04:26 PM
For Sale AutoMeter Digital Pro Shift Light Gauge p/n 5787 KEVIN$ Interior Parts 1 12-17-2016 10:27 AM
For Sale Msd digital shift light new 100 shipped streetcar Electronics and Entertainment 0 01-24-2013 01:18 AM
For Sale Autometer Pro Comp 5" Tach, Shift Light, MSD RPM Switch, Module Selector - Package!! Mustang9 Electronics and Entertainment 6 10-20-2011 11:48 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome