Club Cobra GasN Exhaust  

Go Back   Club Cobra > Manufacturers, Engine Builders, tools, and parts. > BackDraft Racing ---
Tach problem...Need Help!!! Tach problem...Need Help!!!
Portal Register FAQ Community For Sale Gallery Calendar Today's Posts

Nevada Classics
MMG Superformance
Main Menu
Portal
Forums

Module Jump:
Nevada Classics
Nevada Classics
MMG Superformance
Advertise at CC
Banner Ad Rates
Keith Craft Racing
Keith Craft Racing
MMG Superformance
January 2025
S M T W T F S
      1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31  

Kirkham Motorsports

Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #1 (permalink)  
Old 03-05-2011, 03:29 PM
Dtgl1's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2010
Location: Coral springs, Fl
Cobra Make, Engine: BDR #181
Posts: 6
Not Ranked     
Default Tach problem...Need Help!!!
It just started yesterday while I was driving, the needle just swings wildly from 0 to 7000. No pattern that I can see. At idle it sometimes goes to 0 and sometimes moves.

Tach is a Revolution gauge.

Anyone got any ideas? Thanks
Reply With Quote
  #2 (permalink)  
Old 03-05-2011, 04:17 PM
RET_COP's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2009
Location: Westerly, RI
Cobra Make, Engine: Fordstroker 408w custom solid roller-Craft ported Brodix 17*heads-CFM ported Vic Jr. intake-1 3/4 primaries- 575hp-TKO-600RR Liberty upgrade- -Moser 8.8 trutrac-McLeod Street Extreme--QA-1-Wilwood brakes, Classic Chambered 3" Cobrapacks, Avon's
Posts: 645
Not Ranked     
Default
What kind of ignition do you have?
Does you in dash tach act the same way?
Check all your wire contacts.
__________________
Lou
Reply With Quote
  #3 (permalink)  
Old 03-05-2011, 04:30 PM
gsharapa's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 1999
Location: Prosper, TX
Cobra Make, Engine: CAV GT40 #169, Ford 408 Stroker & ZF Transaxle
Posts: 2,408
Not Ranked     
Default
Check to make sure you have a good solid ground on it.
__________________
Gary
CAV GT40
Reply With Quote
  #4 (permalink)  
Old 03-08-2011, 10:20 PM
Rwillia4's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Aug 2003
Location: San Diego, CA
Cobra Make, Engine: BDR #455, KC427W, TWM-FI
Posts: 727
Not Ranked     
Default
Yep check the ground.
Reply With Quote
  #5 (permalink)  
Old 03-08-2011, 10:30 PM
twobjshelbys's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,597
Not Ranked     
Default
Does the tach pick up from an electronic ignition box (MSD)? If so check the tap. They usually clip it on with some kind of clamp-on connector that makes a "pin prick" connection through the insulation. It can separate from vibration.
__________________
Cheers,
Tony
CSX4005LA
Reply With Quote
Reply

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads
You may not 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


All times are GMT -7. The time now is 09:08 AM.

Contact Us - Club Cobra Home - Archive - Top

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink