Big problem with 67' f100
Thread Starter
|
New User
Joined: Jan 2008
Posts: 1
Likes: 0
Big problem with 67' f100
hello
I have a 1967 f100 with a 390 was running good till now,
once i get it started it runs good but when im in drive and step on the brake it shuts down its like the fuel line cuts off. i have to put it in nutreal to come to a complete stop. i changed the plugs distributer cap and roater and used a fuel system cleaner and still no luck. i think something might be clogged.
any help would be greatly appreciated!
I have a 1967 f100 with a 390 was running good till now,
once i get it started it runs good but when im in drive and step on the brake it shuts down its like the fuel line cuts off. i have to put it in nutreal to come to a complete stop. i changed the plugs distributer cap and roater and used a fuel system cleaner and still no luck. i think something might be clogged.
any help would be greatly appreciated!
Posting Guru
Joined: Nov 2005
Posts: 1,302
Likes: 0
From: Madison, SD
Might want to replace the fuel filter and check your fuel pressure...then also check the idle speed in drive and readjust the mixture screws--a vacuum gauge works very good to adjust the idle mixture.... what is the dwell on your points? Wondering if they might be a bit tight....
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Just stepping on the brake causes it to stall? Or only when coming to a stop?
Does it have power brakes? Could be a faulty brake booster causing a major vacuum leak when you step on brakes.
Still stock carb?
Does it have power brakes? Could be a faulty brake booster causing a major vacuum leak when you step on brakes.
Still stock carb?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
When you step on the gas from a dead stop, does the truck bog down, and sputter like it wants to die?
When you punch it at speed, does the same thing occur?
If so...this is a typical 2V carb problem.
Replace the accelerator pump diaphram and check valve.
Problem solved.
I'd be inclined to make sure the following two parts were OK before replacing the booster.
C4DZ2365A .. P/B Booster Check Valve / Fits: 1965/67 F100/250 / 1964/68 Falcon / 1965/68 Mustang.
C9AZ2B176B .. Check Valve Rubber Grommet.
The grommet fits into the booster, the valve fits into it.
The grommet over the years hardens up due to engine heat and cracks.
When that occurs, you now have a vacuum leak at the booster.
When you punch it at speed, does the same thing occur?
If so...this is a typical 2V carb problem.
Replace the accelerator pump diaphram and check valve.
Problem solved.
Originally Posted by freightrain
Could be a faulty brake booster causing a major vacuum leak when you step on the brakes.
C4DZ2365A .. P/B Booster Check Valve / Fits: 1965/67 F100/250 / 1964/68 Falcon / 1965/68 Mustang.
C9AZ2B176B .. Check Valve Rubber Grommet.
The grommet fits into the booster, the valve fits into it.
The grommet over the years hardens up due to engine heat and cracks.
When that occurs, you now have a vacuum leak at the booster.
Fleet Mechanic
Joined: Dec 2006
Posts: 1,338
Likes: 6
From: UPSTATE NY
how bout take your carburetor off the truck, set it on a workbench, and take it apart and thoroughly clean it out, then dial in the mixture, jet sizes, etc, and work on getting that timing where it needs to be.
Thread
Thread Starter
Forum
Replies
Last Post
JoeHarbourJets
1973 - 1979 F-100 & Larger F-Series Trucks
1
Mar 12, 2012 10:59 AM
JoeHarbourJets
1961 - 1966 F-100 & Larger F-Series Trucks
2
May 9, 2011 08:05 PM
Merlin68F-100
1967 - 1972 F-100 & Larger F-Series Trucks
12
Feb 25, 2005 07:49 PM
