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Old 12-22-2007, 02:15 PM
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tach wire

Hey guys, I converted my 4.3 to carb and am using an HEI. Which wire do I splice in to connect to the HEI for a tach reading. I've heard it's the white wire on the coil lead and the white wire on the firewall by the brake booster. Which one though

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Old 12-22-2007, 02:18 PM
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What brand of Tach , or is it OE?
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Old 12-22-2007, 02:49 PM
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It's the oe tach.
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Old 12-22-2007, 02:53 PM
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Dang.....
I'm no help to you at this point....
sorry
Someone more knowledgeable will probably be along soon.....
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Old 12-22-2007, 03:12 PM
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are you asking witch wire or witch terminal on the cap ? witch wire I can't tell you , but the terminal is marked on the cap ,on second thought you are referring to a GM hei coil in cap are you not ?
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Old 12-22-2007, 04:46 PM
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There is two plug in's on a HEI one is your hot and the other one is for the tach.Hope this helps you out.
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Old 12-22-2007, 06:00 PM
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Sorry I wasn't very clear on my first post. I know which terminal to use on the distributor. I'm wondering which wire it is that runs from the OE tachometer to hook into the distributor. I've converted from tbi to carb. It had a remote mount coil with two plug in's. One has a red and white wire. I've read that it is the white wire on the OE coil connector and also that it is the white wire coming out of the firewall next to the brake booster. I'm wondering which one is the tach signal wire so that I can run it to the distributor.

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Old 12-22-2007, 06:08 PM
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Sorry not sure about that one.
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Old 12-22-2007, 06:26 PM
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What is the vehicle information? Year, Make,Model?
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Old 12-22-2007, 06:51 PM
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Again, sorry. It's a 1988 s10 auto 4wd.
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Old 12-22-2007, 07:12 PM
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Quote:
Originally Posted by 03eiger
Again, sorry. It's a 1988 s10 auto 4wd.
I'll be right back with the information you need.
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Old 12-22-2007, 07:42 PM
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The white wire is the correct wire going the tach.
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Old 12-22-2007, 09:52 PM
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So it is the white wire on the OE coil connection?
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Old 12-22-2007, 09:59 PM
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YES! That is correct!
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Old 12-22-2007, 10:36 PM
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Thank you very much, ya'll have been a great help
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