Why am i having trouble starting when warm?

[Midcont]

Originally Posted by Gaz64

By all of the replies so far, your starter sounds fine.

What carburetor have you got?

Photos would be good.

It's a Holly 4150

Originally Posted by Phx Mike

Every older carbureted car I have ever owned exhibited this behavior to some extent including my current Cobra. My rule of thumb has always been - when cold (and I mean like first start of the day or after sitting for several hours) use one good pump and then crank with the throttle 1/4 to 1/2 open. When warm, don't touch the throttle just turn the key. Some cars like just a LITTLE throttle on a warm start but not much and if you pump it warm you will almost always flood it and it will take a bit of cranking to get the extra fuel out (and a nice black cloud when it finally fires). My old 390 Galaxie was like this, my small block Camaro, my F-150 with the 351W...all of them.

If the starter is cranking quick when warm it's not your starter.

Thanks, tried this yesterday and worked. will see if the method holds.

Originally Posted by jhv48

Had the same problem with my roush engine when new. Put a 1/2 inch phenolic spacer under the carb. Problem solved. No more percolation.
Also, during hot restarts, use no throttle. Should fire right up.

Originally Posted by E5USMC

99.9%....... you need a spacer between your carb and intake. Had to put one on my old Roush 427R.... problem solved. Just make sure your air cleaner will still clear the hood if you install one.

Originally Posted by mrmustang

CLICK HERE

You only need one metal heat shield and two gaskets.


Bill S.

Thanks guys, this will be my next step if issue persists. Question; open style or four barrel style? The carb is four barrel but either style would work?

Thanks all for replies.

[Gaz64]

Originally Posted by Midcont

Thanks guys, this will be my next step if issue persists. Question; open style or four barrel style? The carb is four barrel but either style would work?

Thanks all for replies.

Should not really matter whether open or 4 hole for a heat shield.

Just get one on there, you'll notice the difference.

Gary

[cycleguy55]

Originally Posted by Midcont

It's a Holly 4150

Thanks guys, this will be my next step if issue persists. Question; open style or four barrel style? The carb is four barrel but either style would work?

The 4150 model number applies to numerous carburetors, with many internal differences. What 'list number' is on the front of the choke horn? ( https://www.holley.com/blog/post/how...on_carburetor/ ) You can use the 'list number' and find the carb number by going to http://documents.holley.com/techlibr...al_listing.pdf

Here's a good article on spacers which gets into the discussion of 4-hole vs. open, as well as some of the other designs (e.g. hybrid). You will, of course, be using a lower height spacer than some of those they're talking about. Carburetor Spacers - Open And Four-Hole Spacers - Hot Rod Network