The Ford Barn

deetz · 04-28-2022, 03:15 PM

Was working on a friend's car (which was running poorly) and noticed that the intake manifold frosted-up when the car was first started. Frost stayed there for quite a while till the engine was good and warm. Thoughts, anyone?

alexiskai · 04-28-2022, 03:53 PM

Intake icing doesn't always lead directly to performance issues. Sometimes it's just a byproduct of your ambient temp and humidity. This problem is more common on cars that use an air filter. It may also indicate a poor interface between the intake and exhaust manifolds.

deetz · 04-28-2022, 03:57 PM

Thanks. Just wondering if it might be related to carbon build-up in the combustion chamber. The plugs were pretty sooty.

burner31 · 04-28-2022, 08:30 PM

Let me ask...do you have an air filter on it...if so take it off, and the frosting will go away

jeepguy1948 · 04-28-2022, 09:06 PM

So will the sooty plugs. I learned this the hard way.

old ugly · 04-28-2022, 11:02 PM

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old vw beetles with single barrel carbs always froze up.
i havent had a model a do that. i would guess, like said above, temp and humidity. let it warm up.

edit

is probably why ford bolted it to the exhaust manifold.

jack backer · 04-29-2022, 07:00 AM

Intake icing is a cause of poor performance, intake heating is common. Make sure your intake is bolted tightly to you exhaust manifold.

Cold intake air causes poor atomization of the fuel,it is a cause of hesitation.

WHN · 04-29-2022, 08:53 AM

I believe all of you, but this is a first for me!

Even at my age, you learn something every day.

Enjoy.

04-28-2022, 03:15 PM	#1
deetz Junior Member Join Date: Feb 2015 Location: State of Jefferson Posts: 13	Frosty intake manifold Was working on a friend's car (which was running poorly) and noticed that the intake manifold frosted-up when the car was first started. Frost stayed there for quite a while till the engine was good and warm. Thoughts, anyone?

04-28-2022, 03:53 PM	#2
alexiskai Senior Member Join Date: Apr 2018 Location: Mebane NC Posts: 2,350	Re: Frosty intake manifold Intake icing doesn't always lead directly to performance issues. Sometimes it's just a byproduct of your ambient temp and humidity. This problem is more common on cars that use an air filter. It may also indicate a poor interface between the intake and exhaust manifolds.

04-28-2022, 03:57 PM	#3
deetz Junior Member Join Date: Feb 2015 Location: State of Jefferson Posts: 13	Re: Frosty intake manifold Thanks. Just wondering if it might be related to carbon build-up in the combustion chamber. The plugs were pretty sooty.

04-28-2022, 08:30 PM	#4
burner31 Senior Member Join Date: Dec 2014 Location: Shawnee, Ok Posts: 3,471	Re: Frosty intake manifold Let me ask...do you have an air filter on it...if so take it off, and the frosting will go away __________________ Keith Shawnee OK '31 SW 160-B

04-28-2022, 09:06 PM	#5
jeepguy1948 Senior Member Join Date: Jan 2022 Posts: 720	Re: Frosty intake manifold So will the sooty plugs. I learned this the hard way.

04-28-2022, 11:02 PM	#6
old ugly Senior Member Join Date: Aug 2021 Location: alberta canada Posts: 585	Re: Frosty intake manifold Sponsored Links (Register now to hide all advertisements) old vw beetles with single barrel carbs always froze up. i havent had a model a do that. i would guess, like said above, temp and humidity. let it warm up. edit is probably why ford bolted it to the exhaust manifold. __________________ old ugly my old father-in-law told me. "listen close when people tell you how to do stuff they may know something. then do it the way you want."

04-29-2022, 07:00 AM	#7
jack backer BANNED Join Date: Mar 2022 Location: Chenango Bridge NY Posts: 433	Re: Frosty intake manifold Intake icing is a cause of poor performance, intake heating is common. Make sure your intake is bolted tightly to you exhaust manifold. Cold intake air causes poor atomization of the fuel,it is a cause of hesitation.

04-29-2022, 08:53 AM	#8
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 1,819	Re: Frosty intake manifold I believe all of you, but this is a first for me! Even at my age, you learn something every day. Enjoy.