Need help getting to run properly

[Takoda]

Did your kit have a silicone or leather accelerator pump seal? In the old 1948 world the original was leather and the rebuild kits are all trash, they don't work right. I rebuilt my carb 3x before I gave up and swapped the accelerator pump seal back to the old leather one. (I had a problem where it would bog down and want to die if I touched the accelerator at all).
Your first post details some around the accelerator pump, but I am not following it exactly.

I would also ask how you settled at the best idle mix and adjustments. 1 turn from either top or bottom sounds way off (at least way way off at my elevation). I learned to use a vacuum gauge to set your idle mix adjusting slowly and incrementally until you achieve highest vacuum from an old codger that was born and raised on carbs.

Oh my. I did not mean accelerator pump, I meant enrichment valve. And I believe it was rubber, regardless not what what I meant, sorry about that confusion. And this is the first carb vehicle I've had so im new, but have had some help on it. And I just came across a thread about the vacuum gauge things and was going to look into it. I didnt know elevation was an impact on it.

 

[Hoosierman]

Think of it this way, the higher up your elevation is, the less oxygen your vehicle will have to breathe. Have you ever tried running thousands of feet up in a mountain? It's tough!

 

[Brain75]

FWIW, I am at 4,000' elevation, and regularly fought driving from Denver (5280') to Bandimere Speedway (Morrison CO, 6800') if I tried to go over the pass I would have to do a little adjustment at the semi chain up on the pass to keep from belching smoke and being argumentative over the rest of the pass.

 

[Hoosierman]

Well said, I don't live in Flagstaff any longer, but I do know a friend who had an old Grand Wagoneer with a carb that had to keep on the adjustments depending on where he wished to go.

 

[Takoda]

Think of it this way, the higher up your elevation is, the less oxygen your vehicle will have to breathe. Have you ever tried running thousands of feet up in a mountain? It's tough!

Yea, I just didnt think of it i suppose. Lol

 

[Takoda]

FWIW, I am at 4,000' elevation, and regularly fought driving from Denver (5280') to Bandimere Speedway (Morrison CO, 6800') if I tried to go over the pass I would have to do a little adjustment at the semi chain up on the pass to keep from belching smoke and being argumentative over the rest of the pass.

Luckily its fairly a daily to work so dont have a change big enough for that.

 

[Brain75]

In the modern computer wizardy it does it all automatic. Once you get to Idaho Springs (10,000') you can't buy 87/89/91 gas anymore instead they sell 85/87/89. You can get away with lower octane gas at the higher elevation. Anyhow, those are some extreme elevation changes to deal with... Usually we put state or something so people know where we are for general troubleshooting. I have no idea what the elevation of KnightRider98 is so am just throwing out all the info.

I would bet you have a combination of issues, probably not adjusted right (should end up fairly close to the center of the adjustment range for most cases), possible wrong jets, but that is extreme altitude changes. If you bought a sea level vehicle and brought it to Denver you would / should downsize the jets for it's new life at 5000' higher altitude.

 

[Takoda]

In the modern computer wizardy it does it all automatic. Once you get to Idaho Springs (10,000') you can't buy 87/89/91 gas anymore instead they sell 85/87/89. You can get away with lower octane gas at the higher elevation. Anyhow, those are some extreme elevation changes to deal with... Usually we put state or something so people know where we are for general troubleshooting. I have no idea what the elevation of KnightRider98 is so am just throwing out all the info.

I would bet you have a combination of issues, probably not adjusted right (should end up fairly close to the center of the adjustment range for most cases), possible wrong jets, but that is extreme altitude changes. If you bought a sea level vehicle and brought it to Denver you would / should downsize the jets for it's new life at 5000' higher altitude.

I was betting on a combo also. Just needing some places to check. My altitude is 1,352. The truck was bought here also, im only the 3rd owner.

 

[Hoosierman]

Jets, that's a common theme I am seeing with the Motorcraft 2150s across the board.

 

[Takoda]

Jets, that's a common theme I am seeing with the Motorcraft 2150s across the board.

Id have to double check but I think they are original, my buddy advised me not change them when I got the rebuild kit.

 

[Hoosierman]

Has the truck remained in the area for its whole life?

 

[Takoda]

Has the truck remained in the area for its whole life?

As far as I know, yes. Other than driving to a different county.

 

[alwaysFlOoReD]

You mention accelerator pump "hose". Can you take a picture and post? All pumps I've seen are operated with rods and pumps are internal to the carb.
Disregard... I see a bunch of posts between when in wrote this and when I posted. I have a 1977 pinto with the 2.8, and there was a valve I hadn't ever run across. But it is a vacuum, to lean it out. Not sure about an enrichment valve but that could have been added in later years.
I second getting a vacuum gauge and learning to use it.

 

[Takoda]

You mention accelerator pump "hose". Can you take a picture and post? All pumps I've seen are operated with rods and pumps are internal to the carb.
Disregard... I see a bunch of posts between when in wrote this and when I posted. I have a 1977 pinto with the 2.8, and there was a valve I hadn't ever run across. But it is a vacuum, to lean it out. Not sure about an enrichment valve but that could have been added in later years.
I second getting a vacuum gauge and learning to use it.

Number 53 is the one I was referring to.

 

[alwaysFlOoReD]

Number 53 is the one I was referring to.

Ah yes, I know that as the " power valve". I think that the diaphragm can rupture in those, especially if there was a strong backfire. I dont have any true knowledge of those so grain of salt is needed...