Look at my Tach signal

[coyoteboy]

http://www.jbuckle.homeip.net/images/car/tachsignal.jpg
Now thats not ideal for a clean injection, especially as that's at idle with very little other noise.

I checked the IGF output from the ignitor that feeds the ECU with feedback and thats a perfect 0-5v square wave form. Last time i got told to avoid using the IGF signal, presumably in case i altered the feedback to the other ECU (denso is controlling ignition for now) but with the state of the tach signal im going to have to.

J