Ignition modules
Freshman User
Joined: Dec 2005
Posts: 33
Likes: 0
Thought I'd jump in here.
Well my tuck would do the same thing, die and then start after she sat for a while. I'd check to see if I had spark and I wouldn't. Let her sit and then she'd start.
So finally I replaced the pickup in the dizzy and she worked great, no problems for about three years ago then the problem came back. I put in a new pickup and still she wouldn't start. I threw in an aftermarket module from Mallory and she fired straight up. Then a month later same problem so the coil was replaced and it worked great for about 5 months now the same problem.
A couple of days ago she died, no spark. After a few minutes spark then no spark. Had her towed home and she started right up.
I'm replacing the distributor because I think that's the problem. My Bronco is a 1980 with a 351M rebuit motor.
Well my tuck would do the same thing, die and then start after she sat for a while. I'd check to see if I had spark and I wouldn't. Let her sit and then she'd start.
So finally I replaced the pickup in the dizzy and she worked great, no problems for about three years ago then the problem came back. I put in a new pickup and still she wouldn't start. I threw in an aftermarket module from Mallory and she fired straight up. Then a month later same problem so the coil was replaced and it worked great for about 5 months now the same problem.
A couple of days ago she died, no spark. After a few minutes spark then no spark. Had her towed home and she started right up.
I'm replacing the distributor because I think that's the problem. My Bronco is a 1980 with a 351M rebuit motor.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
Don't forget the resistor (hot) wire from the coil to the ignition switch. If it burns out, vehicle no start.
D7AZ-12250-A .. Resistor Wire (Motorcraft DY-263) 49" long; color coded red with two green stripes
D7AZ-12250-A .. Resistor Wire (Motorcraft DY-263) 49" long; color coded red with two green stripes
Elder User
Joined: Jul 2006
Posts: 688
Likes: 0
From: right here in michigan
Originally Posted by NumberDummy
Don't forget the resistor (hot) wire from the coil to the ignition switch. If it burns out, vehicle no start.
D7AZ-12250-A .. Resistor Wire (Motorcraft DY-263) 49" long; color coded red with two green stripes
D7AZ-12250-A .. Resistor Wire (Motorcraft DY-263) 49" long; color coded red with two green stripes
Elder User
Joined: Jul 2004
Posts: 811
Likes: 0
I had 3 blue grommet modules go on my '85 351 over about a 4 year period. First was a Ford, second two were Standard Ignition parts. All died when hot then came back when they cooled down. When I replaced it the third time I used a MSD-6a and added a switch so the pickup fed either the new stock module or the MSD-6a. With the MSD supplied coil connector I could switch to the backup (stock) ignition in about 2 minutes under the hood. It was nice to have the peace of mind of the backup there, but ones I switched to the MSD I never needed it and the spark was sooo much better. As to your popping and flat feeling in the motor, that could be a fuel pump going too. Mine gave those problems when warming up then fine all day, then the next day same issues. Finallly pump gave out.
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New User
Joined: May 2007
Posts: 23
Likes: 0
From: Yuma AZ
What if you are running MSD ignition? Mine is having the same problem but i think its because my alternator is only a 55 amp and the guy that built the engine ran an electric fuel pump, electric fan, and the msd ignition without beefing up to a bigger alternator. plus it is running hot so i am going to replace the fan with a bigger one.
Freshman User
Joined: Dec 2005
Posts: 33
Likes: 0
Originally Posted by NumberDummy
Don't forget the resistor (hot) wire from the coil to the ignition switch. If it burns out, vehicle no start.
D7AZ-12250-A .. Resistor Wire (Motorcraft DY-263) 49" long; color coded red with two green stripes
D7AZ-12250-A .. Resistor Wire (Motorcraft DY-263) 49" long; color coded red with two green stripes
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
The coil is designed to provide a full voltage spark with the 8-9V generally available while the engine is cranking.
The resistor wire cuts the voltage to the coil when the engine is running to prevent the coil from burning up. A resistor wire is made with impure copper and a high temp insulating cover to stand the heat generated in the wire.
The resistor wire cuts the voltage to the coil when the engine is running to prevent the coil from burning up. A resistor wire is made with impure copper and a high temp insulating cover to stand the heat generated in the wire.
Freshman User
Joined: Dec 2005
Posts: 33
Likes: 0
Originally Posted by Torque1st
The coil is designed to provide a full voltage spark with the 8-9V generally available while the engine is cranking.
The resistor wire cuts the voltage to the coil when the engine is running to prevent the coil from burning up. A resistor wire is made with impure copper and a high temp insulating cover to stand the heat generated in the wire.
The resistor wire cuts the voltage to the coil when the engine is running to prevent the coil from burning up. A resistor wire is made with impure copper and a high temp insulating cover to stand the heat generated in the wire.
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