MicroSquirt.com read only forum (Jan.15,2018)

Ian,

Sorry about that, but I thought that the Dave capacitor question was a totally separate topic and didn't belong in this thread.

This thread is about my problems using the existing OPTOIN circuit on the negative side of a coil and having R20 fail open circuit.

The other thread is a question ...

The Microsquirt has the 'Dave capacitor' C27 installed (0.22uF). I noticed that the MSII docs say not to use a Dave capacitor if you are using OPTOIN as an ignition trigger. Is this true for Microsquirt, or can I keep the Dave capacitor and use OPTOIN+ for my trigger? Ideally I would like to avoid ...

That's a good point!!!

Doesn't this apply to other ignition inputs on OPTOIN+ as well, such as hall effect or optical triggers? (Unless you get lucky and the trigger is closed, which would heat up the coil instead.)

I just checked to see what would happen if you exceed the power rating of a 680 ...

Thanks for the pointer to the other thread.

In my case the Microsquirt is actually being damaged by the coil. I have had R20 (the 680 ohm resistor in series with the OPTOIN+ line) fail open twice now while trying to start the car. The car actually did run for a few seconds before it died, and ...

Hi there,

I am setting up a Microsquirt fuel-only system on a car that has a Mallory optical pickup module driving the negative side of an ignition coil. For my tach signal, can I connect the OPTOIN+ directly to the negative side of the coil, and OPTOIN- to ground? Do I need to add any special ...

Hello,

I have been following Megasquirt for years but have only recently been able to actually get a system installed in my car. It is a 1972 Porsche 914 with a 1.7L type IV aircooled flat 4 engine.

I just upgraded to MSII and I have a couple questions.

Is there an AFR table available that is ...