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

so let's see if I understand this correctly, the ign firing order has no advantage on the staging for the injectors.

Don't wire them in series, you'll double the voltage of the flyback spike.


Sorry, if I didn't make myself clear, I meant make 2 batches, each batch with 2 injectors in parallel, but I just wanted to know if there is a particular way I should make the batches, as in, cylinder 1 and 4 in parallel ...

Hi,

I just finished ordering parts to repair my flyback circuit from digikey and I want to avoid blowing it again, I am running a v2.2 megasquirt fuel only on a 1.8 4 cyl vw g60 engine t3 turbo, the car ran great until it was stored for a year and upon trying to start it, the flyback failed and ...

not to hijack your thread, but on a similar note, is there another fet driver that I can substitute for the IXDI404PI FET driver or the MC34151PG??

the electronics stores here in montreal are a lot on the stupid side, having nothing in stock and expecting me to order chips in the hundreds from the ...

I've got a couple of questions for the megasquirt experts in here,

1. is there another fet driver I can use to replace the one in U7??? I've been to 2 different electronic shops here and they don't have a MC34151, or a tip42c for that matter to replace Q1
2. is 4 high impedance injectors in ...

I believe I have found the problem, it is indeed a flyback failure, U7 has a hairline crack. I will try and source the parts locally instead of ordering online, I will keep this thread posted on what happens

I just wanted to know if you figured out this problem, I'm having the exact same problem, injectors stuck wide open with the key in the ign position with the car off.

That's what I thought too, but both outputs seem to be stuck open, I might try the procedure on one of the other posts about using an LED to check inputs and outputs on the megasquirt.

I pulled the megasquirt out of the car again, and have it on the bench with the stim hooked up, as I 've said before, the led on the megasquirt for the injectors seem to pulse in relation to rpm but the ones on the stim are stuck on full, I remember that they used to flash in conjuction with the led ...

okay I was working on the car all afternoon, and I realized something, the minute I plug in the injector harness with the key in IGN the injectors all click open which is why my engine keeps filling up with fuel, the led on the megasquirt flashes but I think the outputs are burnt or stuck open, I ...

okay I get the weirdest symptoms, I tried to check my megasquirt with my megastim, but I think I fried my megastim because I hooked it up to my 12v motorcycle battery, (it's been so long since I built this thing I forgot it was 9v, anyways I finally found a 9v power supply hooked it all up, all the ...

Yeah I know there's supposed to be 12v there, what I meant was when I checked both terminals leading to my injectors, I had 12v on one side and constant ground on the other pin for the injectors, so the injectors were getting constant power and ground with the key in ignition. hope that clears ...

Hi everyone, I need help,


For a bit of history, I'm running a Version 2.2 (copyright 2001) board, it's for fuel only so I guess it's a MS-1 (it's been so long ago I built this I forget now) It ran great ever since it was built and installed on an 81 vw rabbit T3 turbo, the car was stored back in ...