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Q-jets+ cold

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1978Blazerk5

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well how do Q-jets do in the cold. Its supposed to be -25 tommorrow with the windchill, And I have to go to work, and I cant use my normal fuel injected driver (ford van). So how bad is it acually gonna be. Ive never had to drive a carborated(sp) car or truck in extreme cold.


Thanks
 
my truck has a holly and give me a little trouble starting but once shes running shes fine.

EDIT: nevermind, thought that was 25, not a -25. Uhh, im not sure, good luck, let me know.
 
Coldest my truck has seen is 18 degrees. but my truck came from califronia with 110 degree weather.

Hey by the way with that holley what you getting for gas milage?
 
I dont even know, its as big as my head and its too big for my engine so she backfires a bit. I wouldnt be surprised if its between 5 and 10. probably is.
 
My Blazer has a 670cfm Truck Avenger, pump pedal once and fires up immediately , except a couple of days ago it got to -16 (wind chill) and it took three tries and a bit extra warm up time. But not too bad. Better than the fuel injected Honda Accord we also have.
 
Dabba said:
I dont even know, its as big as my head and its too big for my engine so she backfires a bit. I wouldnt be surprised if its between 5 and 10. probably is.
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I had a friend a couple years ago who had a holley he said he hated it, and he was only gettin 8mpg if he was lucky.
 
Dabba said:
I dont even know, its as big as my head and its too big for my engine so she backfires a bit. I wouldnt be surprised if its between 5 and 10. probably is.
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I'm putting a q-jet in my truck for those exact reasons.. 8-10 MPG, runs horribly rich, and the carb leaks a little bit.
 
Back when I had the choke hooked up it ran great in the cold (though it rarely gets far below zero here in CO).

Windchill has absolutely nothing to do with how your carb will run, basically all carburetors will be equally affected by the cold.
 
I just got home from work, its 5 degrees outside now, one pump of the gas and she started right up, this is on my 1977 C30 454 3+3 dually
 
When did you last check the choke operation? When I had a Q-Jet I had to tweak things a little every year when it got cold out. There are several parts of the carb that help it start when cold. The choke plate should basically close ALL the way for starting, then pop open just slightly once the engine makes vacuum. As long as the choke is set up right, I think the biggest test is on your battery and starter.
 
well i will find out in about an hour, boss called and said cause of the cold I dont have to be there till later.

right now its -8 without windchill
 
1978Blazerk5 said:
well she fired right up. Set the chock and started right up. not bad eh
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thats good you got it runnin.i have a edelbrock on mine with electric choke.i always just had to pump it a couple of times and let it crank for 2 or 3 seconds and it would fire right up.
 
boggerless said:
my Qjet has the butterfly zip tied wide open and JR only needs a couple pumps to start. it runs a little rough for a few but then its fine.;):D
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Yep, I've had my choke wide open for a couple years now. I got tired of messing with it, just have to plug it in or let it warm up a little and its good to go :thumb:
 
38377k5 said:
Yep, I've had my choke wide open for a couple years now. I got tired of messing with it, just have to plug it in or let it warm up a little and its good to go :thumb:
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:D its 12 degrees out right now.let me see if it starts.:laugh: yep JR started after a few pumps.:laugh:see the tail pipe smoke?

HPIM0728.JPG
 
Are you guys talking degrees F? Us canucks run Q-jets in -40C so i am sure they will handle the piddly azz weather your getting. I did have one freeze up one me once, had to install a hot air pipe of the exhaust manifold to have enough warm air to prevent freezing.
 
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