OK folks I would like some help. I've got an 86 F250 with the 351w that seems to be too hard to start.
When the temp drops below 60* it takes several restarts and a lot of pedal pumping to get it to stay running. I have a Holley 4160 carb that is only 4 months old. I don't think it's the idle setting. It's actually a little fast. I've played around with the choke, but it doesn't seem to make a difference. Could it be the air/fuel mix? How do you adjust that? Or is it just that this ol' truck is just cold natured? Help me if you can. Thanks.

 

lol mine does that too... i thought it was just he cold, but anyone know?

 

My 86 351W has a Holley 4bbl on it and if the float level is set any too High, it has a hard time starting. I put the gas level just Below the sight screw hole on the Holley Carbs.
Make sure your engine is cold, preferably setting overnight, before you set your choke.
Hope that helps.

90 F-250 351W C6
86 F-150 351W C6

 

If it's an older truck, the engine probably just needs to be warmed up... I think they sell aftermarket block heater plugs, if it gets cold enough where you live, and you could install that. We had an old 78 F250 Ford Ranger growing up, and we cheated when it got really cold out...we put an electric blanket on the engine, closed the hood, and turned it on overnight, if we knew we were going to be driving the truck the next day. Just keeping the block warmer overnight seemed to help.