so when putting in my 351w it came with a duraspark set up. it's out of a 75 ford granada and i got every thing with it. my question is what it the blue wire on the control modual for. the wiring diagram that i got from mustang steves web site doesn't have a blue wire on the control modual. i was just going to leave it disconected but i thought it might be a good idea to ask if any one knew what i was for. would it be a good idea for me to find a control modual off something that doesn't have the blue wire.
None of my diagrams show a blue wire.....Could it be a faded purple which goes to dist? green-tach side of coil black-dist. orange-dist. red-ignition/run white-ignition/start
Never seen a blue wire before. Can you get a pic? Which plug does it go to, the one to the distributor or the power plug? Hotrod-Daddy has it dead on... except I just cut the white wire off flush with the module. It just retards the ignition timeing to help the car start. Mine starts fine without it.
The blue wire is a fusible link for the module. I think they only used it in '74, but they could have crossed over into '75.
If you are gonna bother with a Duraspark conversion ... use a 1977+ setup ... that is Duraspark II and is better ...
I agree with Dan. Plus Duraspark II uses a bigger distributor cap which I have read is better for alot of reasons.
You can put the large distributor cap on any stock V8 distributor made before Duraspark 2... Even points.
yeah i plan on putting in the duraspark II set up eventually. but the 351w i have came with all the stuff to hook up the duraspark set up. so do i need to hook up the fuseable link on the control modual. how would i go about doing that if it is needed, or should i just go to the junk yard and get a different control modual.
The diagram I have shows the blue and red wires tied together and connected to a switched 12v source (hot in start and run).
If the blue wire retards the timing when the starter is engaged, then would it not retard timing all the time if energized with the red wire when running??? Doesn't sound kosher to me. GT 73: The large cap is sold in 2 parts. If you just ask for a cap when you go to the parts house, you will just get the flat round top. You have to ask for the base as well. The base gets used over and over forever, or until broken. For several years the base was a dealer or junkyard part. Now you can get them most anywhere. The base snaps on just like the regular cap. Then the base has clips on it to retain the top. Simple upgrade. Just have to use HEI style plug wires for later model Fords. Oh, and don't forget the taller rotor. If you really want to get fancy, Ford used to put rubber boots over the Duraspark 2 with their logo on them. You can pick the boot up and use it too. Here's one on my 302, kinda dark pic, but you can see it. Dave
Also one thing to remember when changing over is if the car originaly came with a point distributer you need to replace the wire from the ignition to the coil. The stock point wire is a resistor wire and will not let the coil get the full amount of juice that it will need to perform at peak performance. Don
ratio, the blue wire doesn't retard the timing, as mentioned it's just a fusible link for the module. The white wire's function is to retard the timing when cranking the engine to reduce the load on the starter. It doesn't get tied to the red.
