Tachometer not working - '98 4.5 6spd swap

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Jul 24, 2012 | 05:40 PM
  #1  
Hey guys. Has anyone run into an issue with their tachometer not working after swapping to the 6spd? I looked/searched everywhere I could think of to find info, but no such luck. My speedo works fine, and so do the rest of my gauges. I picked up a spare cluster from another '98 parts car and tried every combination under the sun to get it the tach to work (swapping the tach out, swapping the boards; and also using other speedo), but nothing doing. As far as I can tell from the FSM the tach gets its signal directly from the ECU. So that is my primary culprit at this point.

Before I go nuts and start tearing stuff up, is this a common issue? It doesn't seem to be detracting anything performance wise, but I would really just like to have a tachometer other than my ears (pretty good at guessing the RPM's though). Am I just overlooking a simple connector or something somewhere?

Any thoughts, insights, or direction would be great.
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Jul 27, 2012 | 09:12 AM
  #2  
Tach signal is composed of.....

Coil Pack #1 -> ECU -> Speedo

Has nothing to do with the transmission, during your swap you must have messed with a wire or two you should not have.

Check to see if your gauge cluster is getting the signal, that will tell all.
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