Intake under carb soaked - JeepForum.com
 
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post #1 of 10 Old 09-12-2017, 08:14 PM Thread Starter
bck4more
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Intake under carb soaked

So I'm having a lot of issues with the intake under the carb (motorcraft 2100) staying wet from fuel and getting to the point to where I'm getting fuel into the oil. What's causing this.

87 4.2

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1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #2 of 10 Old 09-13-2017, 09:58 AM Thread Starter
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1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #3 of 10 Old 09-13-2017, 10:45 AM
mike134
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I would first suspect a stuck float. (also check your fuel hose connections).

But in any case, I would take the opportunity to use the shotgun/cannon repair and just rebuild the carb if you haven't done so in a while, because you would replace all the main culprit gaskets anyway.

Your carb looks pretty clean on the outside though, so let us know if it has recently been rebuilt.
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post #4 of 10 Old 09-13-2017, 11:07 AM Thread Starter
bck4more
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I rebuilt it few month back the jeep doesn't get drove a ton is why it's clean.

1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #5 of 10 Old 09-13-2017, 11:23 AM Thread Starter
bck4more
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Ya know when I first start the jeep I'll give it a pump or 2 and she starts right up runs good but once I drive it and let it set for a little it's takes a lot to get it to start back up.

1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #6 of 10 Old 09-13-2017, 11:36 AM Thread Starter
bck4more
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Ya know when I first start the jeep I'll give it a pump or 2 and she starts right up runs good but once I drive it and let it set for a little it's takes a lot to get it to start back up.

1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #7 of 10 Old 09-15-2017, 07:38 AM
puppybreath
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Off hand, I'd guess power valve or accelerator pump leaking, they're pretty much the only places that you can get an external leak on a 2100. most other leak spots will leak into the manifold. Either one will empty the bowl when the engine's not running. If you have amechanical pump, it will take a while for the bowl to fill and cause long cranking periods when starting.
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post #8 of 10 Old 09-21-2017, 11:01 AM
vadslram
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When you say intake under the carb I assume you are talking internal. My best guess would be the float setting and or needle valve. I couldn't tell by the pics but do you have the stock filter on it? the bypass on the original style filter keeps the pressure low enough to keep the fuel pump from pushing past the needle valve. If the float level is set too high then when you stop it will drip down into the throat and basically flood out. It's also probably either running rich or you have dialed back the idle mixture screws way back so the constant drip over won't flood out when idling.
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post #9 of 10 Old 09-21-2017, 11:36 AM Thread Starter
bck4more
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I have a somewhat cold air intake on it that I made. It's the part on the intake that the carb is bolted to that is what is staying wet.

1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #10 of 10 Old 09-21-2017, 12:11 PM
vadslram
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That's what I thought. Puppybreath must have thought it was leaking on the outside. Definitely check the float level. even seasoned carb rebuilders will have issues sometimes. The needle keeper could have shifted when you were screwing the top plate on, the float could be heavier or partially filled with fluid.. There are a lot of little things that could have slipped.
Good Luck and Let us know what you find.
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