Digifant mk2, no spark

Models manufactured from 1985 to 1992

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Digifant mk2, no spark

Postby idubse7en on Oct Sun 28, 2012 4:23 pm

After shaving the bay and extending the harness I have run into a wall. The Ignition Module is not sending a signal to the coil. I replace the unit with a new module the system was getting spark like it should. When I went to fire the engine, nothing. I've got continuity throughout the circuit, good ground, and 12V; however, while cranking the voltage to the module drops to 8V, I think. Hall, coil, ecu, ignition switch is all good. Any help would be fantaastic.
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Re: Digifant mk2, no spark

Postby MT-Getto on Oct Sun 28, 2012 6:23 pm

Ground issue? Hall sender working right? Lets see your project!
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Re: Digifant mk2, no spark

Postby idubse7en on Oct Sun 28, 2012 7:32 pm

Image

Image

Image

This car was a mess, It still needs a lot of work, and it has only just begun.

The ground in the Module circuit is good. Hall sender is new, but, is not getting a signal because of the ignition module failing. Every time I put in a new module, it fails, within minutes.
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Re: Digifant mk2, no spark

Postby MT-Getto on Oct Mon 29, 2012 6:54 am

Nice car! How about beefing up grounds from block/trans to the chassis? Is the coil toasting them?
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Re: Digifant mk2, no spark

Postby kompressorgolf on Oct Tue 30, 2012 2:35 pm

if the grounds were shot, the ecu is probably fried, run through, make sure all grounds are right, and clean, try another ecu just to be sure, looks like a great start, looks good!
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Re: Digifant mk2, no spark

Postby idubse7en on Nov Thu 01, 2012 11:09 am

Image

The grounds have all been redone but I will def recheck and confirm. ECU has a relay ahead of the power source and the relay is okay so I assume its fine, I will look for another ecu. I need to check the voltage coming from the coil. If I remember the voltage powering the module drops while cranking, from 12V down to 8V
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Re: Digifant mk2, no spark

Postby idubse7en on Nov Thu 01, 2012 7:17 pm

Update, I found a crossed wire in the hall circuit. I get spark now but it still wont start. I've checked the knock sensor and thats it. Not sure if I am getting fuel tho I can hear the pump turn on.
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Re: Digifant mk2, no spark

Postby kompressorgolf on Nov Fri 02, 2012 10:23 am

OUTTA GAS? it happens, check, also check the injectors for power WHILE cranking.
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Re: Digifant mk2, no spark

Postby Mikewire on Nov Fri 02, 2012 11:12 am

Also an obvious suggestion, but if you pulled the dizzy, check your timing, maybe you are 180 out.

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Re: Digifant mk2, no spark

Postby idubse7en on Nov Fri 02, 2012 2:50 pm

Car has gas ;) the injectors have 4V of power and while cranking voltage stays the same. Made sure the dizzy and timing is correct. I pulled the injectors and cranked and was not seeing any fuel. Pump is priming but I don't know what the filter looks like. I didn't mess with the fuel system at all besides wiring the injector connector and the wiring is good :confused:
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