tach problems, one more time....

[rakkasan]

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.]

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]

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]

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]

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]

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?