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Mac88 07-18-2011 12:10 PM

Wiring Harness
I unplugged the ECC wiring harness today. The car turns over, but wont start. I'm pretty sure it's because the ECC controls the fuel pump, but now the ECC has been removed. I have an electric fuel pump here that I think will fix that. My question however is this, the distributor was factory, with a connection to the ECC harness. No that the ECC is unplugged, how will that effect?

RippinRon 07-18-2011 12:23 PM

What are you working on?

Mac88 07-18-2011 12:28 PM

88 Mustang GT
I bought the car from someone who started working on it and stopped. He was running a carb, had toggle swith ignition, push button start, etc., but wires are everywhere. There was a MSD box half way connected, he said there was a electric fuel pump back there, just not connected. So I completely removed the harness to clean up the engine bay a little. The plan was to switch to a 351W later this year anyways, but I still want the car running, in the event i try to sell the 302. Any advice on how to started cleaning up this wiring nightmare?

RippinRon 07-18-2011 12:55 PM

3 Attachment(s)
The EEC harness is separate from the the rest. It has three parts the main, the injector and 02 sensor section. The original distributor controls the timing with the eec. The fuel pump is controlled with the eec but goes through the oil pressure switch and only stays running with oil pressure.

Mac88 07-18-2011 01:02 PM

3 Attachment(s)
So basically, I need to change out the distributor with one not needing the EEC? I'm going to post some pictures of what I'm trying to sort through. I just want to get the car running so I can get it to a shop and let someone go through all this wiring and tell me what's what.

RippinRon 07-18-2011 01:31 PM

got to autozones website and join and you can find repair guides and wiring diagrams. Break it down to what you need, ignition etc. Save yourself some money and figure it out.

Mac88 07-18-2011 01:33 PM

Thanks! I'm learning as I go, and I'm always looking to save money.

Mac88 07-18-2011 02:54 PM

I went down to autozone and picked up a new ignition switch. Its amazing how much simplier everything looks in there now without all those wirres and toggles. Now I have to figure out this distributor. Is there a specific vacuum or mechanical distributor I need to look for, or will any 302 distributor work?

LATECH 07-18-2011 07:19 PM

Go to the u pull it yard and get the complete dura spark 2 system off of a 76-77 ish 5.0 . The dizzy will have the vacuum can and the module will have a blue grommet. Get the coil and bracket too.Look the harness over well, most of the duraspark is pretty easy to see. The only place you should need to clip it will be at the red wire for the power from the ignition, clip it on the side closest to the ignition switch( keeping the connector intact) as you will need the white wire to hook to the starter solenoid for the Ignition bypass(during starting).
You can power it with the output from the EEC 4 relay and from the correct starter solenoid.
If you are running a msd then follow there instructions using the output wire from the EEC 4 relay (blue w/red) for the white wire on the msd box (ignition switch on/off circuit)
Sounds like you have a fuel pump on the motor so ignore fule pump wiring , change the sending unit to a non efi sender to eliminate the fuel pump being there as it can cause a starvation problem.

LATECH 07-18-2011 07:22 PM

This might help:

Arrrrgh linkie no workie.
Just google duraspark 2 and youll get a buttload of info

LATECH 07-18-2011 07:26 PM

I have done conversions like this many times, I allways have a big pile of wires left over.
I am doing a dodge dakota right now, it's looking good, only have to weave the cooling fan setup in the loom and its time to tape it up, then Cover it with a convoluted wrap. ;)
I'll keep an eye on your progress

Mac88 07-18-2011 07:40 PM

I sent you a pm

Mac88 07-19-2011 01:21 PM

No luck at the pull yard. I'm going to autozone to buy one now. I know I need the steel gear, but does it make a difference whether I get one vac or two? Should I still buy a coil, or just use the factory coil that's on the car now?

LATECH 07-19-2011 03:57 PM

Get the single vac dizzy, and a new coil
I saw where napa sells the resistor wire you will need, you could also use a ceramic ballast resistor.

LATECH 07-19-2011 05:04 PM

Dont forget the ignition module (box)

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