Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

Dies when cold?

Thread Tools
 
Search this Thread
 
Old Aug 21, 2009 | 07:01 PM
  #1  
berry1234's Avatar
berry1234
Thread Starter
|
Logistics Pro
20 Year Member
Liked
Joined: Mar 2001
Posts: 4,157
Likes: 3
Dies when cold?

78 F250, 400 C6. Truck runs fine when warm, when cold-first 5 minutes, anything more that the faintest pedal stalls the truck. Starts right back up. The choke seems to be working. Anything I can check?
 
Reply
Old Aug 21, 2009 | 08:38 PM
  #2  
montana_highboy's Avatar
montana_highboy
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Vacuum leaks?
 
Reply
Old Aug 21, 2009 | 10:31 PM
  #3  
Bullitt390's Avatar
Bullitt390
Certified Thread Hijacker
20 Year Member
Photogenic
Liked
Joined: Aug 2001
Posts: 14,441
Likes: 59
Club FTE Silver Member

Sounds like a Motorcraft 2100/2150 2 barrel, yes or no?

Josh
 
Reply
Old Aug 21, 2009 | 11:42 PM
  #4  
berry1234's Avatar
berry1234
Thread Starter
|
Logistics Pro
20 Year Member
Liked
Joined: Mar 2001
Posts: 4,157
Likes: 3
No vacuum leaks, yes Moto 2150 2 barrel.
 
Reply
Old Aug 22, 2009 | 12:40 AM
  #5  
Bullitt390's Avatar
Bullitt390
Certified Thread Hijacker
20 Year Member
Photogenic
Liked
Joined: Aug 2001
Posts: 14,441
Likes: 59
Club FTE Silver Member

What all have you tried/ done to the carb?

From my point of view it sounds like either the choke is misadjusted or the idle mixture screws are too lean.

Does you engine have the vacuum advance delay valves?

Josh
 
Reply
Old Aug 22, 2009 | 11:31 AM
  #6  
berry1234's Avatar
berry1234
Thread Starter
|
Logistics Pro
20 Year Member
Liked
Joined: Mar 2001
Posts: 4,157
Likes: 3
I have not done anything to it. Yes, it has the valves. The choke works as far as it runs the rpms up while it's cold, but even with the higher rpms, the slightest tap chokes the motor.
 
Reply
Old Aug 22, 2009 | 02:42 PM
  #7  
Bullitt390's Avatar
Bullitt390
Certified Thread Hijacker
20 Year Member
Photogenic
Liked
Joined: Aug 2001
Posts: 14,441
Likes: 59
Club FTE Silver Member

Have you actually observed the choke plate closed when the engine is cold? (under 70 degrees or so of course)

There are two linkages, one goes to the choke plate and the other goes to the fast idle cam. So the fast idle can operate when the choke plate is disconnected.

Josh
 
Reply
Old Aug 22, 2009 | 03:06 PM
  #8  
montana_highboy's Avatar
montana_highboy
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Originally Posted by berry1234
I have not done anything to it. Yes, it has the valves. The choke works as far as it runs the rpms up while it's cold, but even with the higher rpms, the slightest tap chokes the motor.
Like Bullitt said have you visually verified the chokes operation?
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Aug 23, 2009 | 10:36 AM
  #9  
berry1234's Avatar
berry1234
Thread Starter
|
Logistics Pro
20 Year Member
Liked
Joined: Mar 2001
Posts: 4,157
Likes: 3
Yes, plate is closed when cold. After 5 minutes or so the problem slowly get better-I can give it more gas before it stumbles.
 
Reply
Old Aug 23, 2009 | 06:02 PM
  #10  
fmc400's Avatar
fmc400
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Club FTE Gold Member
At this point I'd get a vacuum gauge on it and see what the needle does while it runs cold.
 
Reply
Old Aug 24, 2009 | 10:39 AM
  #11  
berry1234's Avatar
berry1234
Thread Starter
|
Logistics Pro
20 Year Member
Liked
Joined: Mar 2001
Posts: 4,157
Likes: 3
Will do. .
 
Reply




All times are GMT -5. The time now is 01:15 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE