1966 f100 big six
Thread Starter
|
4th Gear
Joined: Feb 2026
Posts: 4
Likes: 1
1966 f100 big six
My truck has the 300hp 6 in it. I changed the tank put new carb on it and went to electronic points b. Truck start and idles great in garage. when I go run it on hwy I get up to 55 and it stalls out. Got to choke just a little to fire it back up and it does the same thing.
Logistics Pro
Joined: May 2015
Posts: 4,472
Likes: 969
From: Tri Cities, TN
My first guess would be that the float level in the carburetor is too low. But you should check the fuel delivery as suggested in post #3. If you do that crank or run the engine for exactly 30 seconds you should get a minimum of 1 pint of fuel.
Thread Starter
|
4th Gear
Joined: Feb 2026
Posts: 4
Likes: 1
Tried all the above! scratching my head!!!!
Trending Topics
Tuned
Joined: Jan 2007
Posts: 338
Likes: 101
From: Salkum
Since you eliminated the condenser, I would look at the coil next.
Some times when they get an internal short they will work fine at idle and lower rpms but as they heat up they short out and quit working, then cool down they will be fine again.
Had it happen on a Triumph Spitfire many years ago. You can do some research looking up the term Coil Saturation
Some times when they get an internal short they will work fine at idle and lower rpms but as they heat up they short out and quit working, then cool down they will be fine again.
Had it happen on a Triumph Spitfire many years ago. You can do some research looking up the term Coil Saturation
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
Logistics Pro
Joined: May 2015
Posts: 4,472
Likes: 969
From: Tri Cities, TN
@HydroDog Might be on to something. I assume you have a pertronix if you look at their installation instructions in the troubling shooting section, if you have the wrong voltage or the wrong resistance coil it can cause a start and idle but stalling at speed. You did remove the pink resistor wire, right?
Lead Gopher
Joined: Aug 2012
Posts: 10,065
Likes: 1,615
From: Seattle
Good thoughts above. Although it seems to be less common these days the Pertronix modules do occasionally have issues - sometimes only under load. If the stalling continues to haunt you it might be worth reaching out to Pertronix tech support. I've worked with a couple of guys there on issues. I recall one tech named Andy was very helpful.
Thread
Thread Starter
Forum
Replies
Last Post
808f100
1961 - 1966 F-100 & Larger F-Series Trucks
15
Sep 15, 2021 03:50 PM
prestondave
1961 - 1966 F-100 & Larger F-Series Trucks
9
Jan 7, 2013 10:43 PM