Question about 1985 Chevrolet S-10

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I have a 1985 chevrolet pick-up with a 2.5 litre emgine / fuel injected. I want to install a tachometer on the truck. I know that the green wire from the tachometer goes to the negative side of the ignition coil. I need to know exactly where the coil is located on the engine? Please e-mail answer to

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  • flash21840 Jun 25, 2009

    Thanks for your help so far.

    Exactly where on the right side of the motor are these pacs and the module located. I see something that looks a lot like a traditional distributer cap, black with one wire in the middle and 4 around. This item is located near the bottom right side (passenger) of the motor near the back end of the motor near the starter.

    Again, thanks so much for your help but please be as exact as possible. where is this module with the pacs included located at/ Is it mounted on the side of the engine or on the firewall.

    Is what looks a lot like a distributer cap what I'm looking for because you can trace the wires back to the spark plugs. But, I do not see a plug with wires external to the black cap except for the plug wires. Is it possible that this plug that goes into the coil is under the bottom side or on a side I can not see from the top looking down.Do I need to jack the truck up and look from the bottom side and near where the starter is?

    again, thanks,

    Richard T. Lawson---

  • flash21840 Jun 26, 2009

    Thanks so much, I assume that you still hook the green wire to a white wire right?



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The coil packs are located on the passenger side of the motor toward the bottom and this doesnt have a distributor or a coil, it has coil packs and a crank sensor located behind the module. Hook up to white wire.

Posted on Jun 25, 2009

  • mike loshbough
    mike loshbough Jun 25, 2009

    are you going to comment back

  • mike loshbough
    mike loshbough Jun 25, 2009

    im sorry about that! THAT is a distributor follow the center wire from the cap this will go to the coil I forgot 86 is when they started with coil packs not 85 sorry. so follow that center cable to the coil.



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