Ignition Problems
Thread Starter
|
Posting Guru
Joined: Jan 2009
Posts: 1,145
Likes: 0
Ignition Problems
Hey everyone. So yesterday I finally got down to work on the truck. Put on the rebuilt starter went to start it and I have a bit of an issue. I lose ignition when I let off the starter. If I hold the starter the truck runs, but of course thats just tearing the **** out of my starter. The truck has an new solenoid I put on when the starter intially crapped out, in hopes that was the issue and not the starter. So I believe the ignition side of the solenoid is bad but not sure. Also there is a box about 4" by 4" mounted on the driver side under the hood with a black goo running out of it? Any ideas? '77 F150 6.6 C6
Thread Starter
|
Posting Guru
Joined: Jan 2009
Posts: 1,145
Likes: 0
That could be completly possible. However, I thought I replaced it exact. Does anyone have a diargram for the solenoid?
New User
Joined: Sep 2009
Posts: 17
Likes: 0
From: S.W. Virginia
Don't have a diagram but if you can follow a schematic, maybe this will help:
1973-1979 Ford Truck Wiring Diagrams & Schematics - FORDification.net
1973-1979 Ford Truck Wiring Diagrams & Schematics - FORDification.net
Thread Starter
|
Posting Guru
Joined: Jan 2009
Posts: 1,145
Likes: 0
Don't have a diagram but if you can follow a schematic, maybe this will help:
1973-1979 Ford Truck Wiring Diagrams & Schematics - FORDification.net
1973-1979 Ford Truck Wiring Diagrams & Schematics - FORDification.net
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Hey everyone. So yesterday I finally got down to work on the truck. Put on the rebuilt starter went to start it and I have a bit of an issue. I lose ignition when I let off the starter. If I hold the starter the truck runs, but of course thats just tearing the **** out of my starter. The truck has an new solenoid I put on when the starter intially crapped out, in hopes that was the issue and not the starter. So I believe the ignition side of the solenoid is bad but not sure. Also there is a box about 4" by 4" mounted on the driver side under the hood with a black goo running out of it? Any ideas? '77 F150 6.6 C6
If the starter remains engaged after you let off the key , it may be the solenoid doing that ..
Posting Guru
Joined: Apr 2010
Posts: 1,503
Likes: 0
From: Southaven,Ms
the box on the fender is your ign control module and black goo running out of it ussually means its fried
Trending Topics
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
Posting Guru
Joined: Jan 2009
Posts: 1,145
Likes: 0
The box says "Switches" made in bridgesport or something like that. And it doesn't look like an ignition module anyway? Its like a 4" by 4" box. I'm clueless at wiring, so anything is help. haha I'll upload a pic when im down there.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
You're saying that the truck fires up when the key is in START, but as soon as you let off the key to let it sit in the RUN position, the engine quits? That sounds like the ignition switch. Hot-in-START power for the coil comes from the "I" post of the starter solenoid, but once the key is left in RUN, power for the coil is sourced through the switch (so is hot-in-RUN power for the ignition module). If these circuits do not continue to receive power once the key returns to the RUN position, the engine will shut off.
The box with the goo is the ignition module. The goo is black epoxy that seals the underside; with age and heat the epoxy runs out. It needs to be replaced in your case.
The box with the goo is the ignition module. The goo is black epoxy that seals the underside; with age and heat the epoxy runs out. It needs to be replaced in your case.
Thread Starter
|
Posting Guru
Joined: Jan 2009
Posts: 1,145
Likes: 0
You're saying that the truck fires up when the key is in START, but as soon as you let off the key to let it sit in the RUN position, the engine quits? That sounds like the ignition switch. Hot-in-START power for the coil comes from the "I" post of the starter solenoid, but once the key is left in RUN, power for the coil is sourced through the switch (so is hot-in-RUN power for the ignition module). If these circuits do not continue to receive power once the key returns to the RUN position, the engine will shut off.
The box with the goo is the ignition module. The goo is black epoxy that seals the underside; with age and heat the epoxy runs out. It needs to be replaced in your case.
The box with the goo is the ignition module. The goo is black epoxy that seals the underside; with age and heat the epoxy runs out. It needs to be replaced in your case.
