Problems with a motorcraft 2bbl carb on a 200cui i6

[Anonymous]

Hi,

last wednesday I received two carbs that I bought. One was an autolite 2100 and the other was a motorcraft of which I don´t know the exact specific name (number on the tag is: 8Z E VA C8D 26; btw can anyone tell me which carb i got here ^^).
First I tried the motorcraft carb with my transdapt adapter and the engine started but instantly got on high rpm and after some seconds went out. I tried this several times but it was always the same.
After all of these unsuccessful attempts I tried the autolite and everything worked fine.
What could the problem with the motorcraft be? And how can I fix it (I already ordered a rebuild kit)?


regards, ludwig

 

[CAMDEN289]

There are a ton of variables.Were these carbs rebuilt? When you say it went out?I assume you mean it would stall? I guess first thing to check (Assuming the carb is in good condition)would be the choke including the butterfly(choke plate),Maybe the speed is set high on the choke and the plate is staying closed?If it's closed completely that would kill it. You could also be having a vacuum issue.These carbs due to their age can have warped bases which will make them seat improperly,they can also get excessive wear around the Throttle shaft.The shaft is the harder metal so over time the shaft will eat away at the carb body and make the round hole egg shaped .I've seen that a bunch of times.Vacuum leaks can definitely give you the problem you are describing.

 

[Anonymous]

I think both of these carbs were rebuilt, but I don´t know for sure.
By saying it went out I meant it stalled.
When it stalled the plate which is controlled by the choke was completely open.
The vacuum issue was the first thing my mechanic thought about aswell. That´s why we searched for leaks in the carb but couldn´t find any.
Do you think that a rebuild kit might fix the problem as you described it?

And does anyone know the specific name of the carb which I have here?


regards, ludwig

 

[bigcatchdaniel555]

what does the carb look like if it looks very similar to the autolite it could be a motorcraft 2150 which were basically the same carb but it had an altitude valve to allow for incread elevation.

 

[CZLN6]

Howyd Back Ludwig and All:

First, some more info please. Check the size of the two carbs. Look on the side of the fuel bowls, under the accelerator pump actuation rod, You'll see a small circle with 3 digits cast into it. This number, ie, 1.08 will tell you the venturi size in inches. 1.08 means the inner diameter of the venturi throat measures 1.08"

The code you posted doesn't coincide with anything I have. Please check again and repost. If it is in two rows please designate. The code tags can easily be miss replaced on a 40 year old carb, do I wouldn't be surprized if the tag was from something else.

Next do a visual comparison of the two- shape of the choke plates, diameter of the throttle bores, any solinoids, dashpots or gismos.

The symptoms of your first carb are a mystery. Probably more than just one cause. Check to make sure the high speed idle cam connected to the choke mechanism is free and not stuck. Make sure the throttle plates are seating tightly shut when closed.

Please report back as much specific info as possible to help us help you.

Enjoy the journey.

Adios, David

 

[ludwig]

NB: This 'ludwig' is not your familiar "Ludwig". Ludwig has no objection to another 'ludwig'; he simply inserts this note for clarity since the name appears to be case sensitive. The name of the senior member is writ large in the annals of Ford 6.

 

[Anonymous]

Hi,

in the circle it says 1.21. Does that help? Now you might find out at least the period of time when the carb was built.
About the code tag: I think that it was mixed up with the code tag of an autolite 2100 tag. What else might this tag fit to?
For the visual comparison I took some pictures that might help you. I can´t compare the autolite with the motorcraft right now because I only have the motorcraft here.

When we started the engine, we did not use the choke. It was nor connected to some hot water nor was it connected electrically. The throttle plates look like they are seating tightly when closed.

Here are the pictures:












btw something about my name:
My full name is Ludwig Karl, whereas Ludwig is my first name and Karl my last name!!

regards, ludwig

 

[woodbutcher]

Where is the top part of the carb?
Leo

 

[ludwig]

Cool. I have a brother Karl Ludwig.

 

[Anonymous]

@woodbutcher
pictures are coming...i´m still uploading them!

@ludwig
Really How old is he? Where does he live and does he have any german ancestors? I live in bavaria (where all the good beer is from and where the oktoberfest takes place each year )



regards, ludwig

 

[Anonymous]

Pictures completely uploaded and ready to view (they are linked in my post above )

I hope this helps you when trying to help me

In the meantime I really have to say a big thanks for all your help


regards, ludwig

 

[ludwig]

He lives in Des Moines Iowa, but we are Swiss-German on the father's side and Pennsylvania Dutch on the mother's. Noa, woas gilt's? G'suffa sowieso.

 

[CAMDEN289]

As David said try to post all of the info you can.The carb appears to be in good shape.It's a 2150.Where are the choke pieces(The choke spring housing,etc.)?I assume you took them off with the cover for the photo? I know what David is talking about with the throttle plates not seating fully.The thing that throws me off on that one is why is the car stalling? I've seen where engines were idling too high and they couldn't be adjusted lower because the throttle plates were not seating properly.But they weren't stalling as a result.I'm still leaning towards a vacuum leak somewhere.

 

[mustang6]

A blown power valve will drop raw fuel into the engine, causing it to race uncontrollably and stall. If you look down the top of the carb when it's running do you see raw fuel dripping into the engine?

 

[simon]

the fourth pic clearly shows the tag. At first glance, due to the missing decade digit it looks like a AMC/Jeep code, but it ain't. In fact, its a slightly mis-stamped 1978 motorcraft 2150-2bbl off a mustangII 302/5.0l, auto tranny, A/C, 49 states/ non-kali, air horn equipped with altitude compensation device.

Hope that helps.

 

[Anonymous]

Thanks a lot for all your answers and the identification of the carb.
Today I received my rebuild kits for the carb and rebuilt the motorcraft.
After that I tried it once more on my mustang:
This time it didn´t race that high but still stalled.

Power Valve was changed including all gaskets but I´ll take a closer look at it tomorrow again.

Does anyone else have a conclusion about what it might be? Regular rebuild kit was being used.


regards, ludwig

 

[Anonymous]

I think that after I rebuilt the carb I can be completely sure that it´s a vacuum problem. This was also confirmed by some other sources.

Could it be that this vacuum port which is marked by arrows in the picture has to be completely closed cause I think that it wasn´t when I tested the carb.

Could there be any other vacuum port which I might have forgotten or is my transdapt adapter incompatible with the motorcraft carb?





regards, ludwig

 

[CAMDEN289]

Hi,
The item in the photo is a bowl vent whether that is plugged or wide opened isn't going to affect the way the carb runs.The bowl vents were wide opened on the 60's 2100 and 4100 carbs.I would take a good hard look around the base,throttle shaft,and the butterflies.When the carb is installed do you hear any vacuum leaks? There are a few ways to check for them.When the car is running,you can spray carb cleaner,wd 40,or you can use propane Listen for changes in noise and idle quality.

 

[kesteb]

The problem is most likely the adapter. The base of the Motorcraft is not the same as a Holley 2300. That adapter is made for a Holley. When not matched correctly, there will be vacuum leaks. Check the gaskets, etc...

The Jeep guys have been using these carbs for a number of years as a replacement for the Carter BBD. I adapted one to my \6 last year. I made my own adapter out of 1/2" aluminum plate to avoid the adapter problems. Runs great, better then the BBD and even gets better gas mileage.

 

[Anonymous]

Thanks for all your answers. Now I´m definitely sure that it doesn´t work with this adapter.
I´ll try to get another adapter, but my next project will be a different intake manifold with three carbs


regards, ludwig