Tach question

6

68EFIvert

Member

Jan 13, 2007

639

0

17

Camas, Washington

Jan 22, 2007

#1

• Jan 22, 2007

• #1

I have a 68 and converted to and EFI system. I am using a tach guage from retro gauge (2" that fits in the bezel). I am having problems with the guage working. i know it is getting power but it is not showing a signal. Retro Guage has been helpful by telling me the signal is probably different. Does anyone have any ideas on how to fix this interface problem? I am running a harness from fordfuelinjection.com which is based on the Ford harness, just eliminating all the excess wiring. Thanks.

 

F

ForceFed70

That's why they call it "dope"

Founding Member

Dec 6, 1999

4,818

1

69

BC Canada

Jan 22, 2007

#2

• Jan 22, 2007

• #2

You'll need to tell us which ford EFI system you are running.

Where are you getting your tach signal from? If it's the TFI ignition you should have a wire connected to the - terminal of your ignition coil.

 

6

68EFIvert

Member

Jan 13, 2007

639

0

17

Camas, Washington

Jan 22, 2007

#3

• Jan 22, 2007

• #3

I am running a Ford EFI. I have a lead that comes from the harness that is specific for a tach signal. The engine is from a 1990 GT. I have an MSD coil that has the connector for the computer harness so there is not the traditional +/- terminals but there is a green and a red wire that go into the plug. I assume the red must be the +. The harness is from Fordfuelinjection.com. Has anybody used this harness before and if so how did you solve the problem?

 

S

suki243

Member

Dec 19, 2006

662

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19

Southern California

Jan 22, 2007

#4

• Jan 22, 2007

• #4

umm from my own installation I used the red for the + lead from the battery, the black as a ground, and the green to the - terminal from the ignition coil

 

6

68EFIvert

Member

Jan 13, 2007

639

0

17

Camas, Washington

Jan 22, 2007

#5

• Jan 22, 2007

• #5

I figured it out........ I had a bad connection for the power wire.