 Black/purple Tach Wire..question, using an MSD.. (w/six engine) |
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| DougC |
 Nov 28 2005, 04:55 PM
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Senior Member  Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307  |
The Black/Purple wire usually (4 cyl stock) goes to the "-" side of the coil, right? So I have my MSD unit hooked up and the car (6 cyl, MSD) idles and runs fine but the tachometer isn't working.. actually the blk/pur wire isn't hooked up right now either. So, I have a tach adapter and I'm assuming that the "-" wire from it will go to the neg side of the coil with the blk/pur wire from the harness. Does that sound logical? I've researched this quite a bit today so any insite would be appreciated.
Doug C |
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| Mike D. |
Nov 29 2005, 01:57 PM
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OK, It runs now, and pretty good too! Group: Members Posts: 1,445 Joined: 3-January 03 From: Santa Clarita, Ca Member No.: 85 Region Association: None 
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Doug, Don't take the tach adapter out of the package, return it, it wont work. I just went through the same thing. 4 cyl. tach would run off the MSD plug but of course was totaly inaccurate. Then I went a got an early 911 tach and got nothing, bought the tach adapter, and still nothing. ended up taking the tach to North Hollywood speedo and getting them to convert for use with MSD. The Guy there said they completely replace the board inside with one they make just for MSD.
Took it home, plugged it in, works perfect. Is your car a 2.0 with webbers? (IMG:http://www.914world.com/bbs2/html/emoticons/hijacked.gif) |
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Posts in this topic
DougC Black/purple Tach Wire..question Nov 28 2005, 04:55 PM
TimT what year is the car?
some VDO tachs (early ones... Nov 28 2005, 05:22 PM Joe Ricard The black purple wire is the signal wire for the t... Nov 28 2005, 05:41 PM Porsche Rescue I too have an Autometer wired from the MSD tach ou... Nov 28 2005, 07:30 PM TimT oops misread the post
yes tach out from MSD goes... Nov 28 2005, 07:56 PM Aaron Cox i did the same thing......
here is what you ned t... Nov 28 2005, 10:19 PM DougC What picture aaron?
OK, I have the tach adapter..... Nov 29 2005, 09:50 AM DougC No Mike, it's a 2.7L six with CSI ... I am usi... Nov 29 2005, 02:14 PM Porsche Rescue Won't hurt anything to try the 911 tach. Conne... Nov 29 2005, 02:19 PM
Aaron Cox Nov 29 2005, 04:53 PM |
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