I've done some searching but really have not come to any conclusions. Has anyone anywhere ever had success using either the AUX IGN line (non rotary application) or PWM output to drive a stock or aftermarket tach? Connecting to the coils is not an option as it's a sealed pack of 6 coils.

 

Is using the digital out an option?

I'll be doing this tomorrow for driving the FD tach.

I'll let you know how it works.

Seems pretty straight foward.

 

That does not seem to be an option in the software.

 

Aux. Out Function

The Auxiliary Output on the E6X can be configured for one of several functions. They are all output to the Aux Out pin (pin A) on plug J7 in the wiring loom. The available functions are:

Disabled No effect on ECU operation.

Ignition Bypass Bypass signal compatible with some General Motors
ignition systems. This function allows the ignition system
to provide the spark at 10° BTDC at cranking speeds
(below 500rpm). This aids starting. The Aux Out Function
should output a ground signal (~0v) when the RPM is
below 500rpm, then switch to ~5v when engine rpm
exceeds 500rpm.

Staging Signal Logic output that indicates Staging conditions. If Staging is
selected, and the Staged injectors are firing, this signal will
be high (5 volts), otherwise it will be low (~ 0 volts).

Tacho Output Used for driving tachometers when running a multicoil
ignition set-up. This output combines all of the multicoil
signals into one output and this is used to provide an RPM
measurement.

Ignition Toggle This output is used for rotary set-ups where both the
primary and secondary trailing ignition signals are
connected on the single channel. This minimises the
amount of outputs needed to run this engine configuration.

Guess I was thinking of the aux out like what u tried

Is it not outputing any signal?

what output voltage are you using? I think it can be either 5 or 12 volt...

Aux Out Voltage
Select either the 0 – 5v or the 0 –12v range depending on the desired output level
required.

 

I have not scoped it yet. I travelled some distance to set this up and had assumed it would just work so I didn't bring the scope... Stupid me.

Tried both the 5 and 12V options. Should be working on it again next week so I'll definitely be checking the Haltech for output...

 

That sucks.

I think some of the tachs have different settings for cylinders to.

Let me know what you figure out.

 

At the moment it looks like the solution will be an Autometer tach adapter. The coils being used don't have at tach output and no luck with the Haltech's output. This irritates me greatly.

 

........ it would me to.....

pay 1k+ and can't get the ecu to drive a tach LOL

 

With an autometer tach you should be using the aux out, set to 12vdc and it should work ok. I haven't had any problems with them that way. Those are also the basic tachs though. Not sure on some of the fancy ones.

Is it a stock tach or aftermarket?

 

Should work, yes. Does work, no. Tried both stock and several aftermarket tachs. Finally gave up and used an MSD tach adapter and things worked fine until the MSD tach box fried.

 

Why did the box fry? Voltage spike?

 

Actually it seems that something is intermittent. I did not wire it, so there is a bad connection somewhere and either the box or wiring to it has a fault. Have not had time to look at it since but it seems to work more often then it does not...