Swapped engines and want to use factory tachometer

1987 DODGE RAIDER
120,000 MILES
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JAMMER1 MILLION
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I have the truck listed above. I have done an 1995 Chevrolet 4.3 engine swap with hei distributor. I want to use the factory tachometer which worked off the coil, but when I hook the hei wire to existing tachometer wire tach doesn't work and my volt gauge goes crazy. I was wondering if a tachometer filter would fix this.
Dec 28, 2020 at 10:44 AM
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KENW1
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Hi, make sure you are using the tachometer output of the hei coil and not the power wire. You'll also need a tachometer adapter as seen at the link below.

https://www.ebay.com/i/143698914581?chn=ps&mkevt=1&mkcid=28


This will take the v6 signal and adapt it to display properly on your 4 cylinder tachometer.
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Dec 28, 2020 at 12:18 PM