Hi All,

I've installed a GM TBI EFI on my vehicle and have been using the GM electronic module to trigger the standard coil. I've been have some tach problem (erratic and high) so I'm trying to solve that and kill some other problems. I've decided to replace the standard coil with the Standard DR35 discussed on this forum. I've bought one but there is no pinout on the 4 connections on the coil. I can probably figure out what is what but it would make me feel better if someone who has already done this would show me what the correct connections are (ie. +, - , Tach ). Since this coil normally has a single connector that plugs into it. I guess they figured you couldn't plug the thing in wrong and didn't bother marking the coil or provide any literature that shows the connections.

Thanks for the help.