F100 stalling when hot
Thread Starter
|
New User
Joined: Oct 2018
Posts: 7
Likes: 0
F100 stalling when hot
i have replaced the entire fuel delivery tank to carb, new wires new voltage regulator new gas. Timing is correct, etc. I can start it and run it for about 30 minutes, and then it stalls like it’s running out of fuel. Let it rest and it starts up. Air temps are around 75 degrees and I’m not driving in traffic. Pretty much driving it in circles on my property to try and see why this is happening. Vapor lock? My thought is that it’s really not that hot and the truck is moving when it stalls. Any help would be appreciated or I might have a f100 for sale
Senior User
Joined: May 2017
Posts: 101
Likes: 0
I have been struggling with the same issue.... Vapor lock has been the diagnosis.
I have replaced everything from the tank forward and still have the issue. I can see the fuel vaporizing in the clear filter between the fuel pump and carb.
I have a 351m and have noticed with headers the steel fuel line runs close to the aftermarket header. I will reroute when time permits.
I have replaced everything from the tank forward and still have the issue. I can see the fuel vaporizing in the clear filter between the fuel pump and carb.
I have a 351m and have noticed with headers the steel fuel line runs close to the aftermarket header. I will reroute when time permits.
Grumpy goat
Joined: May 2017
Posts: 3,058
Likes: 594
Tank vent? If your tank or gas cap isn't vented properly, the pump will create a vacuum on the tank. I fought that for a while. It was wearing out fuel pumps. Someone on here asked me if I had a vented cap, and my answer was yes. But it wasn't vented enough I guess. I drilled a small hole at an angle in the cap. I just make sure the hole is pointed down. I haven't been able to find a better cap. I've got an aftermarket, non emissions type fuel tank, so I don't have an outlet to run a vent.
A few ways to check: Install a clear fuel filter just before the carburetor. When at idle and things are normal, the filter should be full of fuel and even though it's flowing, you can't tell. If it's partially full and bubbling, there's an issue. Could be fuel pump, tank not venting, clogged filter, etc. If you observe the filter is half full and bubbling, try removing the fuel tank cap and then watch the filter. If it fills up, then it's probably poorly vented tank.
A few ways to check: Install a clear fuel filter just before the carburetor. When at idle and things are normal, the filter should be full of fuel and even though it's flowing, you can't tell. If it's partially full and bubbling, there's an issue. Could be fuel pump, tank not venting, clogged filter, etc. If you observe the filter is half full and bubbling, try removing the fuel tank cap and then watch the filter. If it fills up, then it's probably poorly vented tank.
Thread Starter
|
New User
Joined: Oct 2018
Posts: 7
Likes: 0
I have been struggling with the same issue.... Vapor lock has been the diagnosis.
I have replaced everything from the tank forward and still have the issue. I can see the fuel vaporizing in the clear filter between the fuel pump and carb.
I have a 351m and have noticed with headers the steel fuel line runs close to the aftermarket header. I will reroute when time permits.
I have replaced everything from the tank forward and still have the issue. I can see the fuel vaporizing in the clear filter between the fuel pump and carb.
I have a 351m and have noticed with headers the steel fuel line runs close to the aftermarket header. I will reroute when time permits.
Laughing Gas
Joined: Apr 2018
Posts: 1,244
Likes: 12
The first thing I'd do is as stated above, put a clear filter on it (I put mine on right before the pump) and see if it is getting fuel when it does this.
You replaced the tank correct? Did you replace it with the same kind of eec or non-eec tank that you had before?
Was your filler neck in good shape? (Not collapsing)
Could also be the coil, but it does seem like it would be fuel system related since it was good before.
You replaced the tank correct? Did you replace it with the same kind of eec or non-eec tank that you had before?
Was your filler neck in good shape? (Not collapsing)
Could also be the coil, but it does seem like it would be fuel system related since it was good before.
Trending Topics
Thread Starter
|
New User
Joined: Oct 2018
Posts: 7
Likes: 0
It is an eec tank but previous owners disconnected all environmental recovery filter returns and catalytic converter the line coming out of the “breather”goes nowhere
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Laughing Gas
Joined: Apr 2018
Posts: 1,244
Likes: 12
I'm asking because my understanding is that the two different tank types vent the tank differently.
Freshman User
Joined: Jul 2018
Posts: 26
Likes: 0
What distrubutor do you have? Points or electronic pick up?
Maybe a different angle of looking at it from a spark perspective.
I had a 302 in the past with an electronic pick up in the distributor.. when the engine would warm up (After about 30 mins or so), the electronic pick up would no longer work, the engine would shut off and i would have to wait for the engine to cool off for a while and then it would start again. Replaced the pick up and never had the issue again.
Maybe a different angle of looking at it from a spark perspective.
I had a 302 in the past with an electronic pick up in the distributor.. when the engine would warm up (After about 30 mins or so), the electronic pick up would no longer work, the engine would shut off and i would have to wait for the engine to cool off for a while and then it would start again. Replaced the pick up and never had the issue again.
Thread Starter
|
New User
Joined: Oct 2018
Posts: 7
Likes: 0
Thread
Thread Starter
Forum
Replies
Last Post
Alex Archer
1973 - 1979 F-100 & Larger F-Series Trucks
3
Sep 30, 2018 09:48 AM
Rexmortis
1967 - 1972 F-100 & Larger F-Series Trucks
30
Feb 6, 2018 06:46 AM
69supercj
1961 - 1966 F-100 & Larger F-Series Trucks
3
Oct 30, 2014 07:41 PM
Steve A
1973 - 1979 F-100 & Larger F-Series Trucks
11
Jan 5, 2005 07:31 PM
only56fords
1948 - 1956 F1, F100 & Larger F-Series Trucks
6
Nov 3, 2003 12:49 PM