I have a 1978 F-150 Custom 1/2 ton. It has a brand new 400 dropped into it. I've recently got it on the road, but my carb keeps loading up, spitting some smoke, then dying. Any help? It's a Holley Carb. It may need rebuilt but I want to know the best route to go. Thanks!

 

Is it a stock holly/motorcraft carb?

 

I believe so. I found a new one for 175 I think ima pick up.

 

Thats what i would do, my bro has an edelbrock 600 cfm on his 400 and it works really good. But if you got some money i would recomend a holley demon, they are awesome

 

If you smell richness lean it out.

 

That's exactly what my father thought. Thanks!

 

If its a brand new motor you have to tune the carb and motor. You know, fiddle with timing, little change in plug gap, air/fuel mixture, carb spacer or no, all sorts of little adjustments.

 

Were getting there.