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  1. 3.9L V6 Specific Topics
    I just put a Tachometer on my 1991 Dakota 3.9l Automatic LA block engine. I want a tach in it so I can watch what the engine is doing. I noticed that under FULL Throttle the engine is shifting at 4,000rpm. The engine sounds like its wound out pretty good but the tach is only showing 4k rpm when...
  2. 3.9L V6 Specific Topics
    Hey guys, Im looking to install a Tacho in my 91 3.9l Dakota. It is an Automation truck so there is no factory tacho. I want this gauge so I can keep an eye on the rpms at different times of use. I know that I need to hook the Tacho wire up to the negative side of the coil to get the rpm...
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