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whatsup
Guest
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 Posted:
Sun Dec 11, 2005 1:55 am Post subject:
Cold weather stalling |
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My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way a
429 should. I know the accelerator pump is OK and is set properly. The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
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Doc
Guest
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| Posted:
Sun Dec 11, 2005 3:03 am Post subject:
Re: Cold weather stalling |
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I have the same trouble with my 351 Cleveland with a Holly carb. What I have
to do is readjust the air\fuel mixture every time the weather changes.
"whatsup" <cmelchapholt123@aol.com> wrote in message
news:84ac253d3bb517730d63298543612b20@localhost.talkaboutautos.com...
| Quote: | My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way a
429 should. I know the accelerator pump is OK and is set properly. The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
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Dude
Guest
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| Posted:
Sun Dec 11, 2005 4:50 am Post subject:
Re: Cold weather stalling |
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"Doc" <kf@beth.net> wrote in message news:SlHmf.2573$Y72.528@bignews1.bellsouth.net...
| Quote: | I have the same trouble with my 351 Cleveland with a Holly carb. What I have
to do is readjust the air\fuel mixture every time the weather changes.
"whatsup" <cmelchapholt123@aol.com> wrote in message
news:84ac253d3bb517730d63298543612b20@localhost.talkaboutautos.com...
My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way a
429 should. I know the accelerator pump is OK and is set properly. The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
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I would say the problem is related to your choke, if you have one. You need a richer fuel miture when cold weather starting, hence your pumping the gas pedal vigourously.
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BradandBrooks
Guest
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| Posted:
Sun Dec 11, 2005 9:14 am Post subject:
Re: Cold weather stalling |
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Had the same problem recently on my 4160 Holey, 351M Bronco.
Check for the obvious first: wires, rotor, cap, etc. They can die fast man.
Mine did.
On my 351, the plugs were reading lean, so the boys put in bigger jets.
Adjusted the throttle linkage and the choke, and I guess, just for the hell
of it, replaced the power valve. Runs like a fucking 10mpg dream!
Brad
PS: My warm air vavle is pretty much f**ked too... doesn't matter.
"whatsup" <cmelchapholt123@aol.com> wrote in message
news:84ac253d3bb517730d63298543612b20@localhost.talkaboutautos.com...
| Quote: | My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way a
429 should. I know the accelerator pump is OK and is set properly. The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
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Tom Adkins
Guest
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| Posted:
Sun Dec 11, 2005 9:18 pm Post subject:
Re: Cold weather stalling |
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whatsup wrote:
| Quote: | My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way a
429 should. I know the accelerator pump is OK and is set properly. The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
|
Ahh yes, the old "wiggle the gas pedal on your Ford when it's cold trick" :) I
remember that one well.
Is there a tube with an insulated sleeve going from the choke housing to the right
exhaust manifold? Ford used this for many years and I'm not sure when they stopped.
The choke housing was under a slight vacuum which drew heat from the manifold to heat
the choke spring. It was common for the tube to rust off of the manifold.
They later went to an electrically heated choke spring, the spring housing had an
electrical connector on it. It's common to lose the ground connection between the
choke cap and the housing. Either failure will cause the choke to stay on too long or
not open at all except via the choke pulloff.
It was a common "fix" to back the choke spring off until it only closed part way
when cold (or block it completely open). Engine heat would eventually warm the spring
and open the choke. This "fix" would cause most of the problems you describe. You have
to wiggle the gas pedal on acceleration causing the accelerator pump to supply more
fuel to overcome the lean condition.
Bottom line is to check all parts of the choke system and make sure they are working
properly.
I used to have a 71 T-Bird, nice ride. I could squeeze 16mpg out of it on a trip IF
i kept it at 55 mph. Kinda hard to do with a 429 under your right foot. At 70, it
would plummet to about 10 mpg. |
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Backyard Mechanic
Guest
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| Posted:
Sun Dec 11, 2005 10:01 pm Post subject:
Re: Cold weather stalling |
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"whatsup" <cmelchapholt123@aol.com> wrote:
| Quote: | My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the
engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way
a
429 should. I know the accelerator pump is OK and is set properly.
The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
|
And dont forget the bane of allus who used to wonder WTF when the first
really cold temps hit and car got cold-blooded
The exhaust "Heat riser"..
That's the dealy with the counterweight and spring between the exhaust
manifold and pipe, one side.
When cold is supposed to route exh through the intake to assist in
vaporization.
--
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it! |
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Tom Adkins
Guest
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| Posted:
Sun Dec 11, 2005 11:19 pm Post subject:
Re: Cold weather stalling |
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Backyard Mechanic wrote:
| Quote: | "whatsup" <cmelchapholt123@aol.com> wrote:
My motorcraft 4300 carb works fine on my 1971 T-B 429 in warm weather.
When cold weather set in, it still works fine after a complete warm up.
Trying to move the car before a ten minute warm up results in the
engine
stalling and sputtering. By pumping the gas vigorously, the car will
accelerate after sputtering a bit. Each time I barely touch the
accelerator this happens. After warmed up, the car accelerates the way
a
429 should. I know the accelerator pump is OK and is set properly.
The
warm air valve on the air cleaner doesn't work at this time and I am
having trouble finding a new one.
And dont forget the bane of allus who used to wonder WTF when the first
really cold temps hit and car got cold-blooded
The exhaust "Heat riser"..
That's the dealy with the counterweight and spring between the exhaust
manifold and pipe, one side.
When cold is supposed to route exh through the intake to assist in
vaporization.
I was TRYING to forget those. Monumental PITA. |
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