Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Tach not working after carb swap

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Old Feb 11, 2002 | 03:06 PM
  #1  
Brian Felts's Avatar
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From: Chillicothe Ohio
Car: 89 RS 355/ 89 IROC Convert
Engine: Hot Cam 355/TPI 305
Transmission: All 700r4's
Tach not working after carb swap

Well here is what i have done........I swaped out my TBI for a Carb. I used the Proform HEI with Vac advance. I also have a MSD box and used the 3 pin connector. The car runs fine however the tach is just dead. I have the white Tach wire plugged in to the Tach pin on the dist. but still noting on my dist ther are 5 pins 3 in the back where the MSD jumper and + and Tach pins in front.


ANy Ideas
Brian
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Old Feb 11, 2002 | 10:20 PM
  #2  
colincamaro's Avatar
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From: puyallup,wa usa
sounds like a bad ground
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Old Feb 11, 2002 | 10:47 PM
  #3  
Matt86Z's Avatar
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From: NB, Canada
If the tach's floating, it's the ground strap.
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Old Feb 12, 2002 | 06:24 AM
  #4  
Brian Felts's Avatar
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Joined: Jul 1999
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From: Chillicothe Ohio
Car: 89 RS 355/ 89 IROC Convert
Engine: Hot Cam 355/TPI 305
Transmission: All 700r4's
I am not getting any movement at all..........With the MSD Harness they have no power going to the + side of the coil is this correct?

Brian
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Old Feb 12, 2002 | 01:49 PM
  #5  
Brian Felts's Avatar
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Joined: Jul 1999
Posts: 760
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From: Chillicothe Ohio
Car: 89 RS 355/ 89 IROC Convert
Engine: Hot Cam 355/TPI 305
Transmission: All 700r4's
Got it fixed............when using the MSD you must us the tach output on the MSD box. Hey I learned something new.


Thanks
Brian
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