 TAC doesn't work, ONly thing that doesn't |
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| Randal |
 Apr 9 2011, 04:40 PM
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#1
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Advanced Member  Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750  |
Fired up "222" today after another extensive check to be sure everything was right.
Pressure lubed the bearings (2 quarts) then drained the excess. She fired right up and immediately had 80psi of oil pressure. Fuel pressure went right to 70psi, which is right. Only thing that didn't work is the TAC. In my car there is a yellow wire coming out of the Mallory CDI which goes to the TAC to provide the signal. I check continuity again and it confirms. The other wire on the TAC is a ground which has continuity to the chassis. So where do the wires go, i.e., ground and signal? Or maybe I'm missing a wire?? Here is a picture of the back of the TAC with the three posts labeled 1,2 & 3.  |
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Replies(1 - 5)
| J P Stein |
Apr 9 2011, 06:37 PM
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#2
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
A rev limiter & a shift light is all you need for engine speed.
When is the last time you looked at an instrument while AXing? (IMG:style_emoticons/default/biggrin.gif) |
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| Randal |
Apr 9 2011, 06:46 PM
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#3
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(J P Stein @ Apr 9 2011, 05:37 PM)  A rev limiter & a shift light is all you need for engine speed. When is the last time you looked at an instrument while AXing? (IMG:style_emoticons/default/biggrin.gif) Come on JP, just trying to get things back in order. And of course you're right, I've never looked at the TAC and will need to move the shift light someplace new as I really didn't see it. Funny, but that's how it is when your concrentrating on other things. Anyway here is a diagram I found on the web, tied to Pelican:  Looks to me like my 1 (his 11) is 12V, 2 (his 12) is the sending wire and 3 (his 13) is the ground. Now if this is right no wonder mine didn't work. Would sure appreciate a confirmation. |
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| Randal |
Apr 11 2011, 06:50 PM
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#4
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
It is now working. Yea. |
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| SirAndy |
Apr 12 2011, 12:53 AM
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#5
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
I guess i'm too late to the party, but yes, the Tach also needs 12V ... (IMG:style_emoticons/default/smile.gif)
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| Randal |
Apr 12 2011, 10:20 AM
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#6
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(SirAndy @ Apr 11 2011, 11:53 PM) I guess i'm too late to the party, but yes, the Tach also needs 12V ... (IMG:style_emoticons/default/smile.gif) Thanks Andy. Sometimes the wiring diagrams don't help when you are running a different system, like mine. Although this one would have been easier if I'd had my reading glasses on and carefully checked the back of the TAC. |
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