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Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sat Feb 04, 2023 2:46 pm
by lovosal
yes of course!!
I attached some photos.

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sat Feb 04, 2023 5:19 pm
by PSIG
It is difficult for me to see if the injector is on INJ1 output pin (P1-8). It is also hard to see if you have multiple grounds to your power supply for the ground current. I see you don't have a lot of stuff running, but always have all three power grounds (P1-2, 3, 4) independently to power source ground, and the single ground (P1-14) for collecting sensor signal grounds (only). It will work other ways, but that is generally recommended.

Use care when firing coils open-air, as the sparks make very large EMR (noise) that can mess with your operation. If you already know they are working when the ignition LEDs flash, I would disconnect them (or replace with more LEDs) to avoid confusing issues for remaining testing. Just IMO.

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sat Feb 04, 2023 6:34 pm
by lovosal
Wow, I still have a lot to learn...
I don't have any earth connected... apart from that, the LEDs didn't work for me from the first day.
the coils work and spark so i can disconnect them.
What I don't know is how I should connect the lands and where. in fact I thought it was not necessary.
Could you explain where I should connect them for the test bench? or tell me where I can look to see an image that is always better to see.
Thank you.

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sat Feb 04, 2023 11:58 pm
by PSIG
In your last photo, the NO2C is not powered. As you are driving 12V devices, I would make power connections directly to your 12V power source.

NO2C_power•gnd.jpg
NO2C_power•gnd.jpg (126.27 KiB) Viewed 1335 times

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sun Feb 05, 2023 12:41 am
by lovosal
ok, so i'll connect the + to my 12v power supply.
And do I also connect the 3 GND to the negative of my power supply?
Or should I connect them to another site? If so, what site should I connect them to?
When I did the tests, the board was powered by the USB cable from the computer. That is why the no2c board is not powered by that outlet.

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sun Feb 05, 2023 3:05 pm
by PSIG
PSIG wrote: Sat Feb 04, 2023 5:19 pm… always have all three power grounds (P1-2, 3, 4) independently to power source ground,
PSIG wrote: Sat Feb 04, 2023 11:58 pmAs you are driving 12V devices, I would make power connections directly to your 12V power source.
I'm not sure what you misunderstand. 12V to power supply (+) and GND to power supply GND (0V).

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sun Feb 05, 2023 3:43 pm
by lovosal
I already have my digital osciliscope, it's similar to the one they left me. Now I have to learn to handle it a bit, otherwise I won't be able to solve problems by visualizing the data it shows me. I have also connected the three negatives (grounds) to the negative of my power supply, and I have taken out a positive so that it works without the pc connected.
I have also finished preparing the communication harness to be able to connect the home ECU with speeduino.
I'll give you some photos.

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Sun Feb 05, 2023 3:50 pm
by lovosal
PSIG wrote: Sun Feb 05, 2023 3:05 pm
PSIG wrote: Sat Feb 04, 2023 5:19 pm… always have all three power grounds (P1-2, 3, 4) independently to power source ground,
PSIG wrote: Sat Feb 04, 2023 11:58 pmAs you are driving 12V devices, I would make power connections directly to your 12V power source.
I'm not sure what you misunderstand. 12V to power supply (+) and GND to power supply GND (0V).
Yes, I try to explain.
In my power supply I have positive +, negative -, and ground.
The question is, if I have negative and ground, (ov) which one would I go to? it does not matter to put it in the negative than on the ground. (I attach a photo)

apart now when connecting the lands, something curious happens to me, it turns out that now the injector does work! It is heard and changes noise when you raise the rpm! but when the ground is on, what doesn't work now is the sparks from the spark plugs. And if I disconnect the ground, the injector stops working, but the sparks work!
Is it a problem that my laboratory source does not have enough strength?

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Mon Feb 06, 2023 9:25 am
by JHolland
You need to connect to 12V and 0V, you do not connect to earth/ground on the PSU. Unfortunately, in vehicle wiring 0V, earth and ground are all used as terms for the connection to the battery negative terminal so it can be confusing. 0V is technically correct because a vehicle has no connection to earth/ground.

Re: Opel Astra G project, original Ecu + speeduino (Parallel/piggyback)

Posted: Mon Feb 06, 2023 9:55 am
by lovosal
OK thanks.
The question now is why if I connect the ground on the speeduino, it doesn't. The sparks work, and the injector does, and if I disconnect them, the injector doesn't work and the sparks do.
I will need a separate power supply to feed coils on one side and the injector and speeduino board with another source.
Could all this be because my source is not very powerful? and can not with all things at once?
it only gives 5 amp