Whack Tach - SaabCentral Forums
*
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum


Go Back   SaabCentral Forums > Saab C900, 1979-1993 & '94 Convertible (C=classic) > C900 Workshop

C900 Workshop Classic 900 (1979-1993 & '94 Convertible) Technical Forum.

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 21st May 2009
Mrb00st Mrb00st is offline
Senior Member
 
Join Date: Jan 2005                                                
Location: Raleigh, NC USA
My Saabs: 1988 Saab 900 SPG
Posts: 155
Default Whack Tach

i was hoping i could get some input on this...

my 1988 SPG has a nearly non-functional tachometer. It works about a quarter of the time... mostly it just sits at 0, but when it is active it bounces around a lot. The car is running smoothly so I tend to doubt it's the ignition amplifier module, but I am wondering if there are any connections i should check to see if I can pin this problem down. Any help would be appreciated...

-James
__________________
1988 Saab 900 SPG, Edwardian Gray 5 speed manual
135,000 miles, 2.0L 16v Turbo/APC, Bone Stock! (For Now)
www.carthrottle.com
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 21st May 2009
IronJoe's Avatar
IronJoe IronJoe is offline
Saab Lunatic
 
Join Date: Aug 2002                                                
Location: PNW
My Saabs: '87 Airflow Convertible, '08 Turbo X SC
Posts: 3,821
Garage
Default

James,

The ign amp module sits in the inner fender and can get hit with corrosion - I'd unplug it and check the connections, it's an easy (and cheap) test.
__________________
*1988 BMW M3* - Current project
*1987 Airflow vert project thread* - 400bhp, Eurotuner Magazine Feature Car - Now on T5
*1987 SPG project thread* - Sold
*1999 Lightning Blue 9 Viggen* - Sold
Reply With Quote Quick reply to this message
  #3  
Old 21st May 2009
Rodentmaster's Avatar
Rodentmaster Rodentmaster is offline
Saab Lunatic
 
Join Date: Aug 2004                                                
Location: Australia
My Saabs: ....................empty.
Posts: 2,213
Default

There is a little PCB circuit INSIDE the tacho that can get......

dry joints and from memory a little edge connector on the board which could cause grief.
It is close to torture to get the tacho apart without damaging the needle but it can be done.
Then there is the cluster left hand edge connector itself which could be worn or on the fritz.....
__________________
Quote:
Woah! Don't expect men to talk to your face if you patronise that establishment!
RodentMaster, post links responsibly!
Eat the Pudding!
------------
ODE to the N\A
"I have not TURBINE to compress my buttocks, O lord,
Pity will be thine when thoust can crap on with boost.
We of the 'N\A - N\A' knowst nil of the pulling glory,
Yea, to post, thy blight the day of those who pressurise their pipes,
Alas, suck be mine that my chariot breathes,
Strike me down for mine is an unworthy existance"

Reply With Quote Quick reply to this message
  #4  
Old 21st May 2009
Mrb00st Mrb00st is offline
Senior Member
 
Join Date: Jan 2005                                                
Location: Raleigh, NC USA
My Saabs: 1988 Saab 900 SPG
Posts: 155
Default

checked the ign. amp connection - it was clean and shiny. cleaned up the whole thing, tightened it back down and hooked it back up - still no tach.

so irritating! This'll be my next project.
__________________
1988 Saab 900 SPG, Edwardian Gray 5 speed manual
135,000 miles, 2.0L 16v Turbo/APC, Bone Stock! (For Now)
www.carthrottle.com
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 10:36 PM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.