Ignition on my 390
Senior User
Joined: May 2002
Posts: 100
Likes: 0
Ignition on my 390
I finally got done with putting my 79 cab on my 76 frame and got everything hooked up but I don't have any spark. i have about 6.8v running into the coil from the ignition module and about 13.8v coming from the batt./ignition switch.--but there is nothing coming out of the coil. I have already tried putting in a known good coil and ignition module but still got nothing. I have also tested the pickup coil and that checks out o.k. Any suggestions/advice on what to do next? anything else to check?
thanks for all the help
thanks for all the help
Posting Guru
Joined: Jun 1999
Posts: 2,415
Likes: 3
From: Comox Valley, Canada
Ignition on my 390
Try jumping 12 volts direct to the coil plus and see if you can start it. This will bypass the ignition system, dont run it for hours and hours like this 
Let us know if it starts, then we can go from there.
Sparky
Let us know if it starts, then we can go from there.
Sparky
Posting Guru
Joined: Jun 1999
Posts: 2,415
Likes: 3
From: Comox Valley, Canada
Ignition on my 390
>I tried jumping 12 volts directly into the coil and still
>didn't get any spark.
Ok where are you checking for spark?
If you are checking at the coil output and still no spark. Bad coil, bad coil output wire, lack of ground (green/yellow wire from distributor negative to ignition module), bad ignition module, to name a few possibilities.
If you have spark at the coil output and none at any sparkplugs... rotor button, distributor cap, 8 dead sparkplugs or wires
Sparky
>didn't get any spark.
Ok where are you checking for spark?
If you are checking at the coil output and still no spark. Bad coil, bad coil output wire, lack of ground (green/yellow wire from distributor negative to ignition module), bad ignition module, to name a few possibilities.
If you have spark at the coil output and none at any sparkplugs... rotor button, distributor cap, 8 dead sparkplugs or wires
Sparky
