Runs bad when cold
Thread Starter
|
New User
Joined: Mar 2005
Posts: 1
Likes: 0
Runs bad when cold
Just bought a 1982 f-150 w/ the inline 6 cylinder, 4 speed stick. Start it up and have no problem with first roll out of the driveway but immediately runs VERY rough until it reaches normal operating temp.(about a mile) then it runs like a top. Vacuum advance problems? Thermostat? I haven't worked on a car in ages but this one looks reasonable to tinker with. Any help appreciated.
Senior User
Joined: Jan 2003
Posts: 327
Likes: 1
If you have an automatic choke, see if it is working. It could be not closing all the way or opening up to soon. Also check and make sure the foil tube that connects from your exhaust mainfild to your air cleaner is hooke up. There should also be a metal tube that connects to the exhuast manifold that connects to the top of the carb.
Senior User
Joined: Jun 1999
Posts: 303
Likes: 0
From: Nova Scotia
Originally Posted by rabalcer
Just bought a 1982 f-150 w/ the inline 6 cylinder, 4 speed stick. Start it up and have no problem with first roll out of the driveway but immediately runs VERY rough until it reaches normal operating temp.(about a mile) then it runs like a top. Vacuum advance problems? Thermostat? I haven't worked on a car in ages but this one looks reasonable to tinker with. Any help appreciated.
Laughing Gas
Joined: Apr 2003
Posts: 837
Likes: 2
From: Minnesota
Sounds like a choke out of adjustment to me. I have the same problem with Clyde. When I set it up for cold weather starts it sometimes likes to fast idle at a stop when it's warm. I just readjusted it because it did just what you're describing; hard start, rough running initially with a lot of stumbling, etc until it warms up.
With the vehicle cold take off the air cleaner, being careful not to bump the linkage. When you manually open the throttle by moving the linkage the choke plate should snap shut. If it doesn't you may have to loosen up the locking screws and rotate the cover until it does close properly. It may take a little experimentation to get it right. I've always found this to be a bit of a trial and error thing. When the engine starts the choke plate should open just a bit, progressively opening further as the engine and choke heater coil warm up.
Not an expensive thing but it can be a PITA until it's right.
Good Luck with it!
Roger
With the vehicle cold take off the air cleaner, being careful not to bump the linkage. When you manually open the throttle by moving the linkage the choke plate should snap shut. If it doesn't you may have to loosen up the locking screws and rotate the cover until it does close properly. It may take a little experimentation to get it right. I've always found this to be a bit of a trial and error thing. When the engine starts the choke plate should open just a bit, progressively opening further as the engine and choke heater coil warm up.
Not an expensive thing but it can be a PITA until it's right.
Good Luck with it!
Roger
