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

if the fuel pump circuit is blown does this affect the cpu in any way shape or form?

tomf757

No, the fuel pump circuit doies not affect the CPU at all.

The flyback failure should not affect the fuel pump circuit (the most common cause of the fuel pump circuit dying is the voltage being reversed, even momentarily, and can result from the stim or vehicle power being hooked up backwards (usually), or from negative spikes in your voltage supply (much less often). Replacing the fuel pump transistor usually fixes it.

Lance.

thank you for this helpful reply, I do not believe that I hooked anything up wrong, but?

Or at least I'll try again, now that I have the unit back. Anyone have any ideas before I start up again?
Thank you
Tom

Only one pointer, read the manual then read it again and then once more before going near the car. Take it apart sentence by sentence until you get it. You are clearly very close to getting running but you need to understand the wiring side of things and the basic tuning theory or you will fry the unit again or worse. This advice is intended in a helpfull spirit not as a criticism. I to tried to do it with the manual used only as a last resort but even with a lot of experience in engines and electronic systems I could not make it work until I spent 3 nights reading the book over and over until every word went in.

Good luck,

Jon

Only one pointer, read the manual then read it again and then once more before going near the car. Take it apart sentence by sentence until you get it.

Jon,

Yeah, that's very good advice. I am frequently asked if the manual can be made simpler. However, there isn't really anything in there that is superfluous. Virtually every sentence and paragraph contains important bits of info. If a new user reads it and doesn't think there's anything in a particular section, chances are they have missed something crucial.

Of course it is very hard to learn everything on the first read through the manual, so you have to go through it a few times, unfortunately. So I would advise the new user that you'll know you are ready to proceed when you understand all the relevant sections, and there's nothing that seemed vague or 'filler material' or too obvious to be mentioned in a manual.

Lance.

I am running a single point injector, but the meagsquirt has two wires going to the injectors. How would one choose the correct wire and what do you do with other.
I have read a lot, but this is something I did not see.
Thank you

Tom,

If my thinking is right you would set the injector firing to simultaneous and number of injectors to 1 and then you can use any injector output. Seems to make sense to me but I have to say that I couldn't see any reference to that in the manual, not that I looked for long. I think this is the right configuration unless anyone knows better?

Jon

If the rains don't come this weekend I'll give it a try.
Thanks

What a bummer now I have no injector pulse after waiting for 4 months to get this thingy back from being repaired by the person who put it together.
I really do not know how any one else is fairing with this, but I am really considering a carb and let the pollution be as it is.
ANY AND ALL HELP IS WANTED AND APPRECIATED HINT HINT HINT

So when I crank the engine the light flash like the injector is getting the info to fire, but NO! Yes, the injector does work as verified by shorting to ground (disconnected from the MS) the enging really wants to run, but with out gasoline it is just an old air pump.
PLEASE SEND SOME HINTS !!!!!!!!!