240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

72 240 Crank Position Sensor/ Tach

Old 03-22-2012, 06:20 PM
  #1  
Registered User
Thread Starter
 
Join Date: Oct 2011
Posts: 5
72 240 Crank Position Sensor/ Tach

I'm working on getting my 1972 240 road worthy, it was given by a friend who inherited from a family member that passed. Its got 36k and is surprisingly clean.

I finally got it running but when it starts up the Tach is maxed out the whole time (though actual engine speed is normal) Does the dash tach get it's RPM signal from a magnetic CKP like modern cars??? if so where is it so I can test, I have the feeling its with the distributer but can't decide which wires they are. Any help appreciated
jagarcia89 is offline  
Old 03-22-2012, 08:50 PM
  #2  
The Good Twin
 
NismoPick's Avatar
 
Join Date: Aug 2005
Location: Wild Wild West, UTAH!
Posts: 20,616
The 240Z is pure carbs...

The tach receives it's signal from the - side of the coil.

www.xenons30.com/reference
NismoPick is offline  
Old 06-04-2012, 01:37 PM
  #3  
Registered User
 
chaztg's Avatar
 
Join Date: Aug 2002
Location: Sandyeggo
Posts: 15
sounds like a bad tach. Common even in a low mileage survivor like yours.
chaztg is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
LSUDuke
280ZX (S130) Forums
11
08-18-2013 07:55 PM
moorebl
280ZX (S130) Forums
1
04-15-2011 09:04 PM
thxone
280ZX Performance / Technical
5
10-22-2007 04:40 PM
assimilated420
280ZX Performance / Technical
0
05-12-2005 03:17 PM
bonz
280ZX Performance / Technical
10
10-17-2003 04:10 PM


Thread Tools
Search this Thread
Quick Reply: 72 240 Crank Position Sensor/ Tach


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.