carb. icing
Thread Starter
|
New User
Joined: Sep 2003
Posts: 2
Likes: 0
carb. icing
have a 300 I6 in an older 1980 travel van (great van)..... having a problem with the base of the carb. icing up in 40F. temp. and lower. As a result the motor powers out to the point of stalling......Any suggesting as to what the problem may be......thanks for any help.
Laughing Gas
Joined: Jun 2003
Posts: 1,218
Likes: 2
From: Parkville, MO (KC)
Well, you didn't perhaps put on headers recently, thus removing the heat from the heat riser to the intake manifold?
If you are running stock, I think they still have a heat riser in the 1980 setup. Maybe the exhaust gas diverter (little flapper with a metal coil and a weight) maybe froze up in the position that directs all the gases out and does not allow enough heat to rise up around the intake manifold.
Possible the 1980 setup used a warm air "stove" to the air cleaner -- I don't know for sure, especially for a van. But in the stove setup, there is a sheetmetal shroud over the exhaust manifold which collects some warm air for a duct up to the horn of the aircleaner. There is a thermally activated flapper that sends warmed air to the carb in cool conditions. It may be shot or stuck closed.
Hope one or the other of the above helps you.
If you are running stock, I think they still have a heat riser in the 1980 setup. Maybe the exhaust gas diverter (little flapper with a metal coil and a weight) maybe froze up in the position that directs all the gases out and does not allow enough heat to rise up around the intake manifold.
Possible the 1980 setup used a warm air "stove" to the air cleaner -- I don't know for sure, especially for a van. But in the stove setup, there is a sheetmetal shroud over the exhaust manifold which collects some warm air for a duct up to the horn of the aircleaner. There is a thermally activated flapper that sends warmed air to the carb in cool conditions. It may be shot or stuck closed.
Hope one or the other of the above helps you.
Senior User
Joined: Jan 2003
Posts: 121
Likes: 0
From: Indiana
I have an 81 f150 and the carb was icing up on me at that temp and soometimes 50 degree temps. I found out that it was sucking air under the carb and that little space plate. I replaced teh gaskets and its fixed
Thread
Thread Starter
Forum
Replies
Last Post
81ChopTop
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
56
May 1, 2016 09:44 PM
Old red 1986
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
15
Apr 7, 2015 11:09 AM
SuperDuty93
1973 - 1979 F-100 & Larger F-Series Trucks
24
Dec 23, 2012 12:23 PM
KC8QVO
6.7L Power Stroke Diesel
25
Jan 14, 2012 04:58 PM
Big Red
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
Apr 15, 2004 12:41 AM
