tach problems, one more time....

rakkasan

Currahee!!
Mar 31, 2005
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my tach worked (thanks to Aaron) when I was running the stock ECU w/ EMB. When I swapped to Stinger, the tach no longer worked.

Today, I ran a jumper from the #1 lead (thick black wire) of the 4 position plug on the ignitor straight to the rpm wire on the tach lead on the back side of the gauges. Nothing. I thought that the stock wire might be grounded between the ignitor & the gauge connector socket, so I snipped it & wired in the jumper directly to the socket, still nothing. I checked the tach ground, perfect.

The stinger is picking up the signal, but I can't get the tach to. Any ideas?
 

IJ.

Grumpy Old Man
Mar 30, 2005
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I come from a land down under
Using an NA Tach here Mark, when I went standalone I had to take the tach to an instrument builder to have it "tuned" so it was happy with the Tach signal from the new ECU.

Turns out Toyota tachs are very fussy and will only read in a narrow range.
 

rakkasan

Currahee!!
Mar 31, 2005
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IJ.;975227 said:
Using an NA Tach here Mark, when I went standalone I had to take the tach to an instrument builder to have it "tuned" so it was happy with the Tach signal from the new ECU.

Turns out Toyota tachs are very fussy and will only read in a narrow range.

I would think that a jumper would work since it bypasses the ECU, but it isn't.....

Must be time for a MSD tach converter. Anyone have the part number?
 

tlo86

Ninja Editor 'Since 05'
Jul 24, 2005
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rakkasan;975228 said:
I would think that a jumper would work since it bypasses the ECU, but it isn't.....

Must be time for a MSD tach converter. Anyone have the part number?

dr tweak sells dakota ones i think...
 

tissimo

Stock is boring :(
Apr 5, 2005
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do you have a 1jz tach or 7m tach?

IIRC the stinger converts to wastefire? maybe causing problems if you have a 1jz tach
 

rakkasan

Currahee!!
Mar 31, 2005
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Fort Campbell, KY
tissimo;975663 said:
do you have a 1jz tach or 7m tach?

IIRC the stinger converts to wastefire? maybe causing problems if you have a 1jz tach

1j tach, but with running a jumper straight from the ignitor to the tach, would Stinger effect it?