Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

SLR tacho doesn't work with MSD coil

Started by LS1LX , Sep 30 2017 07:51 PM

Please log in to reply

4 replies to this topic

#1 LS1LX

Forum Fixture

Members
1,931 posts

Location:Sydney
Joined: 22-November 05

Posted 30 September 2017 - 07:51 PM

Changed from a Bosch coil to MSD blaster 2 coil and my tacho doesn't work.
Would this be coincidental or should I be looking at coil?
Can I wire tacho to pick up off negative on dissy?

Back to top

#2 hanra

Oh My, Don't you post alot

Members
10,832 posts

Name:Brad
Location:Farrrrrr North Qld
Car:1975 LH SL/R 5000, 1967 Morris Cooper S, E36 BMW, Toyota Corolla, Isuzu DMax
Joined: 24-March 11

Posted 30 September 2017 - 08:41 PM

The tacho is supposed to pick up off the NEG terminal on the coil.

You may need a Tach Adaptor, but I wouldn't have thought so.

Edited by hanra, 30 September 2017 - 09:44 PM.

Back to top

#3 myss427

Forum Fixture

Members
1,636 posts

Location:Canberra
Car:427 hatch, CV8 Monaro, Ve SSV ute. Was part owner A9X sedan until he sold it without telling me!
Joined: 17-November 05

View Garage

Posted 30 September 2017 - 09:29 PM

Had the same issue, bought the Taco adaptor recommended, made no difference was told I needed the digital one, bought it still did not work, bought the last one they said would work no problems, had problems. Took it off and the taco works now, buggered if I know what happened but have three types of MSD tach adaptors.

Back to top

#4 jd lj

Forum Fixture

Members
2,100 posts

Name:James D
Location:in the shed
Car:LJ SVO
Joined: 03-December 10

Posted 01 October 2017 - 07:19 AM

I wouldn't have thought that the blaster coil would do this to you, but I know that the msd 6al-2 isn't compatible with the factory tacho. The tacho reads a coarse signal but the 6al-2 produces a fine signal, perhaps the coil does the same. I took my tacho to the local instrument repair guy and he modified it somehow and everything works fine now.