Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Large Truck
Sign in using an external account
Register Forgot Password?


Large Truck My truck is bigger than yours. The forum for 2+ ton trucks (all years), COE's, Louisville's, Big-Job's etc.

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-25-2014, 12:29 PM
jimspop jimspop is offline
New User
 
Join Date: Aug 2014
Posts: 4
jimspop is starting off with a positive reputation.
75 F700 probs

I have a 75 F700 fire pumper with a 390. Just put in new points etc. Didn't want to pull a load or rev up. Loosened up a line from the carb to base of distributer, and it runs great. Tighten the line up- runs pooly again. I. no Ford guy, gut whats up????
Reply With Quote
  #2  
Old 08-25-2014, 01:59 PM
351Cleveland C4's Avatar
351Cleveland C4 351Cleveland C4 is offline
Postmaster
 
Join Date: Jul 2011
Location: On the Edge of the Desert
Posts: 3,068
351Cleveland C4 has a good reputation on FTE.351Cleveland C4 has a good reputation on FTE.351Cleveland C4 has a good reputation on FTE.
What line are you talking about? The only thing that goes from carb to distributor is vac advance.

And you may be better off posting in the 73-79 forum. This is 67-72.
__________________
Gas is great, but Diesel kicks Gas
'71 F100 351C 2V, Edelbrock Power Pack, AOD trans
and 7 other fords...
Reply With Quote
  #3  
Old 08-25-2014, 02:15 PM
NumberDummy's Avatar
NumberDummy NumberDummy is offline
Ford Parts Specialist
 
Join Date: Nov 2006
Location: Hacienda Heights CA
Posts: 55,821
NumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputationNumberDummy has a superb reputation
Quote:
Originally Posted by jimspop View Post
I have a 75 F700 fire pumper with a 390. Just put in new points etc. Didn't want to pull a load or rev up. Loosened up a line from the carb to base of distributer, and it runs great. Tighten the line up- runs pooly again. I. no Ford guy, gut whats up????
Welcome to FTE

I asked a moderator to move your thread to the LARGE TRUCK forum, this forum is for 1967/72. With an F700, you won't get much help in the 1973/79 forum which is mostly related to F100/350's.

Your truck does not have a 390 FE engine, as these were only installed in 1968/76 F100/350's and misc 1961/71 Passenger Cars.

More than likely it has a 391 4V FT engine.
__________________
Bill / Retired Ford Parts Manager / SoCal Chapter Member / Part number research: 1928/2001 trucks & 1928/89 passenger cars.

2013 Escape FWD 2.0L Eco-Boost
Reply With Quote
  #4  
Old 08-25-2014, 06:17 PM
Krewat's Avatar
Krewat Krewat is offline
Super Moderator
 
Join Date: Jul 2002
Location: Long Island USA
Posts: 34,541
Krewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputation
What happens when it won't rev or take a load? Does it miss, or just not rev?

That line might be the governor.
__________________
- art k. - Moderator for the Superduty, V10, 6.2L and FE forums
'13 Taurus SHO 3.5L Ecoboost w/Perf Pkg
'01 F250SD SC SB XLT V10 4x4 Volant CAI Hedman headers 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased!
I've been wrong before, I'll be wrong again. Just wait and see. ®
Reply With Quote
  #5  
Old 08-25-2014, 07:02 PM
jimspop jimspop is offline
New User
 
Join Date: Aug 2014
Posts: 4
jimspop is starting off with a positive reputation.
jimsop

It just won't rev. It will when the line is loosened up. Wold the gov be vacuum operated? I'm not a Ford or truck guy
Reply With Quote
  #6  
Old 08-25-2014, 07:28 PM
85e150six4mtod 85e150six4mtod is offline
Post Fiend
 
Join Date: Apr 2004
Posts: 16,215
85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation
Distributors and carbs in those trucks usually had a governor on them. If the gov were disturbed in some way, that might be an issue.

Usually we get the report that the engine will rev with no load, but no revs or power with a load. That is many times a fuel issue.

Since you were in the distributor, my guess is a governor issue.

The line from the carb to the distributor--loosening it up--what do you mean, did you disconnect it, unscrew it partially, what? Usually a line is either connected or disconnected.
Reply With Quote
  #7  
Old 08-25-2014, 09:05 PM
jimspop jimspop is offline
New User
 
Join Date: Aug 2014
Posts: 4
jimspop is starting off with a positive reputation.
jimspop

yes the line was disconnected and it ran well
Reply With Quote
  #8  
Old 08-26-2014, 04:35 AM
big job's Avatar
big job big job is offline
Elder User
 
Join Date: Dec 2005
Posts: 830
big job is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by jimspop View Post
It just won't rev. It will when the line is loosened up. Wold the gov be vacuum operated? I'm not a Ford or truck guy
Yes the gov. is vac operated and you dont have to be a Ford guy most
all work the same. What you say (and sounds like) the diaphram part on
the carb seems to be working, when the line is loose, sounds like the
pendulum in the distributor is stuck or the spring is broken? Although
a tough job while in the truck, its best to pull the dist out. There is two
lines there one from the gov to the diaphram Pass side (carb) and one
is the vent that goes (driver side) into the carb air horn for clean air.
To set these remove the clean air hose remove its barb on the dist. its
a square (barb) which is access to the gov. the bitch part is to turn
engine by fan or bump it till the pendulum comes around to the hole where
a allen set screw shows with allen wrench clockwise increase speed and
counter clockwise decreases speed against spring tention. Sounds to me
the pendulum is stuck out (centrifical gravity) which closes the clean air
line inturn gives vac. to the diaphram thus the engine wont speed up.
First test is take off the line at the diaphram while running put your finger
on the fitting there should be vac==race engine up then put finger back
on and the engine should idle no matter where the throttle is. If good the
problem is distrubutor. hope I my writing is understandable best I can say.
My bets are its a 391 with 2 or 4 bbl square bowl Holley notorious for
loading just about running- black smoking- when its rain & snow around 38 to 40 degrees they get carb icing. we run them for a minute shut down and
walk a way for a bit then restart they just need a little engine heat.
sam
Reply With Quote
  #9  
Old 08-26-2014, 07:42 PM
jimspop jimspop is offline
New User
 
Join Date: Aug 2014
Posts: 4
jimspop is starting off with a positive reputation.
jimspop

Would there be any problems with leaving the line disconnected?
Reply With Quote
  #10  
Old 08-27-2014, 02:53 AM
big job's Avatar
big job big job is offline
Elder User
 
Join Date: Dec 2005
Posts: 830
big job is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by jimspop View Post
Would there be any problems with leaving the line disconnected?
No but I recomend some kind of air filter perhaps a small pill container with
some foam so it dont suck up something or them mud wasps get in there..
sam
Reply With Quote
Old 08-27-2014, 02:53 AM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
75 F700 oil Amon45-70 Large Truck 1 08-11-2014 10:27 AM
1996 F700 airbrakes frozen anthonyh75 Large Truck 3 01-31-2014 12:41 AM
95 F700 7L to 95 7.5L swap. Same PCM? 1GUNRUNNER Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) 2 06-02-2011 12:47 AM
Anyone with pics of 2010 F250 with Leer 700 series Tonneau Outdoor75 Super Duty & Heavy Duty 0 12-03-2010 10:50 AM
Are all cabs the same? icrman Large Truck 2 11-03-2009 03:57 AM


Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Large Truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 11:15 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup