Carter carb troubles
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Cross-Country
Joined: May 2002
Posts: 98
Likes: 1
From: Southeastern Virginia
I agree, however I did try that. I took a large srewdriver and tapped the carb pretty good with the handle. No success.
I took the fuel line off the carb and plugged it. The truck starts fine and runs OK until it runs the floatbowl dry, so it seems the problem is definately that the needle valve is not cutting the fuel off.
My dillema: I bench-checked the action of the needle on the old carb and it worked, but when I put it back on the truck, it threw fuel out of the float overflow like crazy. I put a remanufactured carb on and it does the same thing. The fuel pump is the one that was on the truck when I purchased it in 1992. I've never heard of a pump getting stronger with age, although anything is possible.
I'm thinking maybe I should take the remanufactured carb back to NAPA and try and get another one. I haven't altered it in any way, and I'm thinking once I take it apart my leverage to get another one is out the window.
I took the fuel line off the carb and plugged it. The truck starts fine and runs OK until it runs the floatbowl dry, so it seems the problem is definately that the needle valve is not cutting the fuel off.
My dillema: I bench-checked the action of the needle on the old carb and it worked, but when I put it back on the truck, it threw fuel out of the float overflow like crazy. I put a remanufactured carb on and it does the same thing. The fuel pump is the one that was on the truck when I purchased it in 1992. I've never heard of a pump getting stronger with age, although anything is possible.
I'm thinking maybe I should take the remanufactured carb back to NAPA and try and get another one. I haven't altered it in any way, and I'm thinking once I take it apart my leverage to get another one is out the window.
Thread Starter
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Cross-Country
Joined: May 2002
Posts: 98
Likes: 1
From: Southeastern Virginia
I agree, but it didn't work out that way.
I tried that, but it didn't work. I got a large screwdriver and banged on the carb pretty good with the handle, but it didn't help. I took the fuel line off and plugged it, and the truck starts and runs ok until it runs the float bowl dry.
My dilemma is this:
I bench-checked the needle on the old carb and it works well, but when I put it back together it sprays fuel out of the float overflow tube like crazy. I put an out-of-the-box remanufactured carb on, and it does the same thing. The fuel pump is the same one that's been on the truck since 1992, and I've never seen a pump get stronger with age, although anything is possible.
Since I haven't altered the new carb, I'm not real hip on taking it apart. I'm thinking I'm going to try and get NAPA to order another one.
My dilemma is this:
I bench-checked the needle on the old carb and it works well, but when I put it back together it sprays fuel out of the float overflow tube like crazy. I put an out-of-the-box remanufactured carb on, and it does the same thing. The fuel pump is the same one that's been on the truck since 1992, and I've never seen a pump get stronger with age, although anything is possible.
Since I haven't altered the new carb, I'm not real hip on taking it apart. I'm thinking I'm going to try and get NAPA to order another one.
Thread Starter
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Cross-Country
Joined: May 2002
Posts: 98
Likes: 1
From: Southeastern Virginia
It must be the fuel pump
I got a SECOND remanufactured carb from NAPA and put it on and it does the same thing. As soon as the fuel pump starts pumping, you get raw fuel spraying everywhere out of the carb. This one sprayed so hard it sprayed the windshield and the top of the truck. Again, if I disconnect the fuel line, the truck will start and run normally until the float bowl is empty.
We're not talking rocket science here. There's the fuel pump, the fuel filter, and the needle attached to the float, and that's it. There is nothing else in the circuit, so it must be the fuel pump. It's the mechanical one, driven off the camshaft, and I think it's the one that came with the truck originally. I don't see how a pump could get stronger with age. Maybe there's some sort of check valve in the pump that's stuck - who knows?
At any rate, I ordered a replacement pump. If that doesn't fix the problem, maybe I need to add some sort of pressure regulator in the fuel line, but it never needed one before.
I thought I knew what I was doing, but this kind of crap makes a person start to doubt themselves.
We're not talking rocket science here. There's the fuel pump, the fuel filter, and the needle attached to the float, and that's it. There is nothing else in the circuit, so it must be the fuel pump. It's the mechanical one, driven off the camshaft, and I think it's the one that came with the truck originally. I don't see how a pump could get stronger with age. Maybe there's some sort of check valve in the pump that's stuck - who knows?
At any rate, I ordered a replacement pump. If that doesn't fix the problem, maybe I need to add some sort of pressure regulator in the fuel line, but it never needed one before.
I thought I knew what I was doing, but this kind of crap makes a person start to doubt themselves.
FTE Legend
Joined: May 2008
Posts: 56,542
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From: In my own world
there is a relif valve in the pump, to make it "coast" when the needle is closed in the carb. usually they don't fail, but you have the short straw this time.The new pump should fix it right up.
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Cross-Country
Joined: May 2002
Posts: 98
Likes: 1
From: Southeastern Virginia
Figured it out - very embarrasing.
I was thinking about how it seems like there is no resistance to the fuel flow, as soon as the bowl fills, gas starts running out of the float overflow, when it hit me like a ton of bricks........there was no resistance, meaning the fuel wasn't being held back at all, meaning maybe I was inputting fuel into the vent.
I checked, and I had the vent and the fuel lines crossed. They're both the same size nozzles, just on opposite sides of the front of the carb. The only reason I'm 'fessing up at all is maybe someone else will have the same issue, search and find this thread, and save themselves some trouble.
Excuse me....I have to go drain the 50/50 oil/fuel mixture out of the crankcase.....
I checked, and I had the vent and the fuel lines crossed. They're both the same size nozzles, just on opposite sides of the front of the carb. The only reason I'm 'fessing up at all is maybe someone else will have the same issue, search and find this thread, and save themselves some trouble.
Excuse me....I have to go drain the 50/50 oil/fuel mixture out of the crankcase.....
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