MPGuino stopped suddenly working..
 

Hello!

I installed e85 fuel-box. The MPGuino did work before that, and during that.
I removed it, and then MPGuino does not display any info from injector.

I have several MPGuinos and all tested, so it can't be that.

At idle, the injector gives around 70Hz signal(Measured with Hz meter, i dont have oscilloscope).

I tried by adding some kind of lowpass-filter just to test what happens, 4k7 and 100n, and it brought some kind of signal to MPGuino, but it's very distracted.


Any thoughts what could be?

I think that it's a disconnection somewhere between injector and guino, or maybe there's no proper ground connection to it.

Yea that popped in my mind too when i was reading your other post,
I gotta check the injector wiring if there is something wrong. Was going to yesterday, but the weather was terrible. Today it is going to be sunshine :D

EDIT: I checked the wiring from the injector, but no luck. :(

Now finally i managed to get it working!

The issue was umm.. well i dont know what the issue was, but i got it working again by moving the signal wire from next to injector to next to ECU.

Why i did'nt think that before? Well because it did work before too with the same setup...

I think there was just a bad contact... When you hooked the cable to new point of the injector's harness it started to work again.

No it was'nt that. I soldered it to the wire previously, and after new try, i moved it to another point, into the connector going to the injector. And after another try, i hooked it to the point where it first time did work. And this time, just near the ECU.
So i'm sure it was not a bad contact.

I was on a road trip back to Canada from California, and about halfway back my mpguino suddenly stopped working as well.
Then about the time I hit the border it suddenly started working again.
My guess.. maybe it over heated?
My GPS did a similar thing in the hot California heat on my next trip down.

My issue was not on MPGuino itself, it was the car. I think the wiring harnesses are worn here and there and something just created a disturbance to the signal.

Maybe we should start an FAQ thread here concerning these kind of things. If someone could sticky it also.