warm up time for 302
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Senior User
Joined: Feb 2002
Posts: 291
Likes: 0
From: Ephrata USA
warm up time for 302
hey
i have a 302 in my 1979 f-100, and it takes on average 10-15 minutes jsut to warm up to the point where it will run at a normal idle.....to me this seems like an extreme amount of time, how long does it take you guys to warm your engines in the morning (0-40 degrees farenheit)? we thought it might be the thermostat, so i replaced it. no change, although the ehater does work much better. the other thing we thought was it might be related to this plastic tube near the battery mount, which my dad says should be connected to my air filter......but i have no idea what parts i would need to replace and where they go. any of you have a diagram or a picture of your engine? any info is much appreciated.
Mike S.
1979 F-100
i have a 302 in my 1979 f-100, and it takes on average 10-15 minutes jsut to warm up to the point where it will run at a normal idle.....to me this seems like an extreme amount of time, how long does it take you guys to warm your engines in the morning (0-40 degrees farenheit)? we thought it might be the thermostat, so i replaced it. no change, although the ehater does work much better. the other thing we thought was it might be related to this plastic tube near the battery mount, which my dad says should be connected to my air filter......but i have no idea what parts i would need to replace and where they go. any of you have a diagram or a picture of your engine? any info is much appreciated.
Mike S.
1979 F-100
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
warm up time for 302
Ok there are several factors kicking you in the butt. 1. You don't need to have the plastic tube hooked up. It is for getting colder air to go into your engine. You don't have that problem right now. 2. Your choke is not set right. This is the limiting factor for you to be able to drive your truck. Look at the top plate on your carb. It's called a choke plate. If it is completely closed (less then 1/8 opening) you are suffocating your engine. Try to adjust the choke housing to open it up a little bit. 3. The stove pipe is not hooked up. Should be a tin foil, 1 1/2" dryer vent looking pipe running from your exhaust manifold to the bottom of the air cleaner snorkel. If this piece is off it will take longer to warm up your engine. Helps to suck in hot air which in turn warms it. If all else fails buy a manual for your truck. Auto parts stores sell them for less then $15.00 Great thing to have on hand for instances like this. It will be able to show you what you are looking for and how to adjust it.
Cargo Master
Joined: Jan 2002
Posts: 2,079
Likes: 11
From: LA and CO
warm up time for 302
Check the idle mixture setting on the carb, it may be set too lean causing the problem. The mixture screws are in front of the carb down by the baseplate. Screw them in to lean out the mixture and out to richen the mixture up.
John B.
John B.
