289 Points
Thread Starter
|
Senior User
Joined: Oct 2004
Posts: 123
Likes: 0
289 Points
I have a 66 289 that seems to consistantly burn up points. I can start the engine and let it idle and seems to idle fine. As soon as I put it in 'drive' it either cuts out or idles rough. When this happens I replace the points and it runs fine for months but slowly it will happen again. Anyone have any idea how I can troubleshoot this?
Thanks is advance
Thanks is advance
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
Have you replaced the condensor as well? Do you have a resistor in the system?
Most likely it's the resisitor, or the lack of one. A resistor, properly installed, lowers the voltage to the points when running (but giving full voltage when starting.)
I'm not sure about your 'Stang, but many Fords of that era used a resistance wire instead of a block-type resistor. Possibly it might have been replaced with standard electrical wire at some point, thereby removing the resistance value and giving full voltage to the points all the time...which will cause them to burn up.
Most likely it's the resisitor, or the lack of one. A resistor, properly installed, lowers the voltage to the points when running (but giving full voltage when starting.)
I'm not sure about your 'Stang, but many Fords of that era used a resistance wire instead of a block-type resistor. Possibly it might have been replaced with standard electrical wire at some point, thereby removing the resistance value and giving full voltage to the points all the time...which will cause them to burn up.
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
The resistor, whether a ballast resistor or a resistance wire, is in the circuit supplying power to the hot (Batt.) side of the coil. A resistance wire is a replaceable wire that simply plugs inline before the coil with bullet-type connectors, and has (usually) a braided cloth loom over it. Or you could have the standard type ballast resistor, which looks something like this:
Last edited by TigerDan; Mar 31, 2006 at 06:08 PM.
Thread Starter
|
Senior User
Joined: Oct 2004
Posts: 123
Likes: 0
I thought about that. I just wasnt sure if what was causing the points to burn up would burn up the conversion module.
Trending Topics
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by stangfan78
I have a 66 289 that seems to consistantly burn up points. I can start the engine and let it idle and seems to idle fine. As soon as I put it in 'drive' it either cuts out or idles rough. When this happens I replace the points and it runs fine for months but slowly it will happen again. Anyone have any idea how I can troubleshoot this?
Thanks is advance
Thanks is advance
Your problem is why they don't use em anymore. A good set will last a year--tops. 
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
Elder User
Joined: Jul 2005
Posts: 542
Likes: 0
From: Milpitas, CA; Tyler, TX
That Pertronix setup was sweet. Used them in my '68 Mustang DD and in our '67 Mustang Vert, it's a rock solid unit. Got better gas mileage, slightly better throttle response, and quite a bit more midrange torque. Can't comment on the resistor issue possibly affecting the control module though.