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

This should be a relitivly easy fix, no? does anybody know the power distribution of the board? you know what recieves power first, second, and so on? any help is much apprieciated!

bump..... I hooked up a stimulator to the megasquirt today, and it does the same thing it does in the car, blows the fuse. Anybody??????? Ideas???????

yeah, that was the first thing I checked. I bought the unit pre-assembled and the only thing I have replaced is the two injector transistors. Thanx for the post.

well I finally had a chance to test the transistors, and according to the link you provided they were both blown, but when I got the new ones from digikey, I tested the new ones and all 4 I bought were blown (according the the link)...... so I am thinking it is not the transistors at all. So ...

the fuel pump was getting power from the the same line, but the fuel pump is also on a kill switch inside the car, which has been turned off, I also made a new circuit that just powered the computer and the fuse still pops. How do you check the transistors to see if they are bad? resistance, the way ...

so I was finally able to change the metal screws with nylon ones, and it didn't change anything, fuse keeps blowing. Any other ideas, I would like to finish tuning. thanx in advance.

How do you tell if the mica insulator is bad? I tested resistance between the two transistors that had mica insulators and the heat sink, and on both the middle prong had 60 ohms of resistance, either outside prong was over limit on my DVOM. So then I disconnected both transistors from the heat sink ...

I was burning some different values into the VE table when the ECU fuse blew, no big deal I thought, I changed it but out, but now everytime I turn the key to accessory the fuse blows. So I checked continuity between the fuse and megasquirt, the resistance is .3 so I don't think there is an open on ...

problem solved!!!! the shielding wire was in some way grounding out signal. thanx for all your responses and help!!!!

I am actually getting spark, haven't hooked up a timing light to verify if it is in limp home mode or not cuz I am only getting a voltage spike coming from pin 1, a few posts up I posted a picture of what the vr signal looks like, and what the signal looks like coming from pin 1. I wonder if the ...

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I finally got a chance to unplug the megasquirt and see if the signal changed at all but saw no change. I even switched the EDIS out with another one and got the same 0.2 of a volt spike. any ideas? On a side note I am not using the ford coil pack, is that really an issue? I am using a coil pack ...

Thats a very good question, I never thought to unplug the MS I will do that tomorrow, and check it out. Thanx

that is the output of pin 1 from the edis. I have another edis but the one that is in the car right now is brand new from motorcraft. any suggestions are greatly appreciated.

just for reference this is what the VR sensor output looks like

http://s987.photobucket.com/albums/ae35 ... G_0145.jpg

here is a picture, it looks like a voltage spike.

http://s987.photobucket.com/albums/ae35 ... G_0138.jpg

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So I made some headway but still no still RPM signal to the computer, I am now getting spark. I am getting some signal but it is not a digital square wave like it should be I am getting a 0.2 volt spike. Any ideas?

I don't know if it has been done before, but I thought mustangs had an EDIS ignition module, and the MSD DIS 4 plus was recomended for a 96 mustang. So I figured it would work no problem. I will contact MSD and see is there is an emulator that needs to be put into the circuit. Thanx for the input as ...

I have pin 10,11, and 12 of the EDIS going to input 1,2, and 3 of the MSD, and then the MSD triggers the coil based on inputs received from the EDIS. here is a link to the unit I am using from MSD's website http://www.msdignition.com/product.aspx?id=5803