Stumbling when cold in 3-4 gear... (1 Viewer)

[Ketzer]

I'm having an issue when I first take off driving in the morning. It will pull fine in first and second getting out of the neighborhood, once I get out on the highway and try 3-4, it begins to really stumble and even pop out the exhaust.

I tried starting it up and letting it sit and idle for ten minutes before I left, didn't help.

I tried pulling the choke out, made no difference in the stumbling. (its over 80* in the morning so I wouldn't think it would need to be choked at all, starts fine)

It does eventually get over the stumble if I putter around and run through the gears a bunch, and once it does, it runs fantastic! Plenty of power, smooth, all the plugs look correct color, etc...

Carb is a fresh rebuild, distributor is new, timing is correct on the BB, valves are adjusted...

 

[thebigredrocker]

If you have the origional dizzy, you could drop it in and see if anything changes.

 

[shawnfj40]

Some of these ol 40's are just cold natured.

 

[Ketzer]

Thanks for the replies guys!

The OE distributor was toast, had it's own set of problems so putting it back in would just shift the issues.

I guess I'm having trouble with accepting it has anything to do with being cold natured since it is hotter than a #@!%* right now outside...

 

[White Stripe]

What happens if you move the choke a bit?

 

[Ketzer]

What happens if you move the choke a bit?

Moving the choke a little or a lot while driving had no effect at all.