Ok....starting to rain and stuff outside...but I've got the plate pretty much done...i'm attaching a pic of the 2 ignitors I have setting on it...i'm still looking at this dual coil holder...i'll figure a way to mount it if I think about it long enough...i'm really thinking its going to have to go down where the ac pump went tho...not really any other free spots that open...gawd...I can't wait to get this done...my rex is gonna be sooooo cool https://www.nopistons.com/forums/pub...DIR#>/cool.png

Could someone post up that diagram of the DLIDFIS using the GM ignitors??

either that or tell me what the letter on each pin means...got B and C over on the right and W and G over on the left

In my pic above, the top ignitor is for trailing. As for W and G, I think the G is the same as on the J-109s, but you'll need to test it yourself. Just hook it up and see if it'll run. Maybe try one ignitor on leading and see if the engine starts up and runs normally. If so, you got it wired up correctly. Or if you had a spare dizzy, or knew the ins and outs of wiring up a speaker for testing ignitors, you wouldn't run the risk of testing stuff on your engine.



The rest of your ideas seem workable. Again, I've never hooked up an RX-7, but your ideas have been tried by others with success.

I've got everything wired up with the exception of the ignitors to the magnetic pickups...which one is leading and which is trailing? I got one that faces toward the front of the car...and another that faces over towards the passenger side...already took them out...and i'm ready to jack into the wiring harness with 2 wires...then run that over to the new ignitors...but I need to know which is leading...which is trailing...asap https://www.nopistons.com/forums/pub...#>/biggrin.png



This is the stock 84 12A dizzy

nevermind...found it in another post...the one facing foward is leading...trailing faces the carb...off to finish up and fire that baby up!

I hope you didn't cut the pickup wires. In all my ignition testing over the years, I've never needed to cut any pickup wires. It makes going back to stock possible (as if you'd ever want to, but yeah).

nope...didn't cut the pickup wires...but...I tested everything...its all got power...and I fire it up...and I get no tach...runs rather rough

I think the mains are firing but not the trailing...think I should re-do the wire I've got hooked into the dizzy?



or is there something I HAVE to hook up to get the tach to work...i saw something about a negative tach line or somethin...do I leave the old neg line hooked up to the trailing coil?

Hm...re-did the grounds on the ignitors...tested with the little light thing...EVERYTHING is hooked up right...except for the tach won't come on...so i'm assuming I need to reconnect the factory neg wire to the trailing coil to get it to come on...then...I think the car might actually run



can't tell where its runnin or nothin with the tach not on...it sounded pretty good (I thought)...then when i kicked the choke back a bit it died with a violent backfire...weeeeeeeeeeeeee



I'm hoping its all done right anyway...it did sound a bit...different?...couldn't really tell if it was missing...or not in time or whatever...i'm giving up for tonight...i'll try it again when the sun comes up...someone tell me what to do tho https://www.nopistons.com/forums/pub...R#>/tongue.png



I need to know...what on earth triggers the tach...

negative side of trailing coil, just like stock.



Hmm, once after hooking up DLIDFIS, I accidentally reversed the trailing plug wires. It would idle but would detontate when reved. It barely got around the block. I double checked everything and was like DUH! https://www.nopistons.com/forums/pub...1047683664.gif After that, it ran very nicely.



Hmm, could your problem be the W and G wires got reveresed? How did you check polarity? Or did you? Good luck for tomorrow. https://www.nopistons.com/forums/pub...IR#>/smile.png

I just went by the diagram i found on here using gm coils



im assuming the polarity is correct on the diagram



im not sure which is W and which is G on the GM ignitor...its labeled funny