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Been restoring my 82 f150 and I came across something I can figure out. I replaced my original carb with a new carter YFA 1bbl (like the stock one) and she’s running great. Only thing I noticed, is that although they are the same carburetors, there are two wires that are left without places to go. i’ve attached photos, any help would mean a lot. she’s running great without whatever they are. But i have to get her smogged and want to know if they are vacuum or anything.
Thanks so much!
okayluck
Last edited by okayluck; Oct 26, 2023 at 03:29 PM.
Do you have a wire on the choke? How many connections do you have on the old carb? What color is that wire with the blue plug? Where does that plastic vacuum line lead? There are a bunch of wires and vacuum lines. No way we are going to know without some detective work on your part.
Do you have a wire on the choke? How many connections do you have on the old carb? What color is that wire with the blue plug? Where does that plastic vacuum line lead? There are a bunch of wires and vacuum lines. No way we are going to know without some detective work on your part.
There is a new wire on the choke yes. I initially thought that it was a choke plug but my new one has one that connected somewhere different...
I guess my main question before I dive deeper a is,, would it possible that there could be a vacuum leak coming from the unplugged line itsel(assuming we don’t know where it’s coming from yet)? or would a vacuum leak come from an open
vacuum port on the carburetor? Thank you so much for your help!
Get the engine running, lift the hood, and put your finger over the end of that loose vacuum line. If it's sucking on your finger, it's a vacuum leak. If not, get someone to rev the engine while you test it again. If it sucks on your finger only when the engine is not idling, it's a ported vacuum source. Still a leak, but more of a clue where it possibly goes. Try the finger trick when you first start it cold, and then try it again later when the engine is warmed up. Some of these lines have vacuum cold, or only vacuum when the engine is hot, and some at idle, some only above idle. If you can't figure it out, just stick a screw in the end to block if off.
Get the engine running, lift the hood, and put your finger over the end of that loose vacuum line. If it's sucking on your finger, it's a vacuum leak. If not, get someone to rev the engine while you test it again. If it sucks on your finger only when the engine is not idling, it's a ported vacuum source. Still a leak, but more of a clue where it possibly goes. Try the finger trick when you first start it cold, and then try it again later when the engine is warmed up. Some of these lines have vacuum cold, or only vacuum when the engine is hot, and some at idle, some only above idle. If you can't figure it out, just stick a screw in the end to block if off.
Perfect. this is exactly what I needed. Gonna check, but I will most likely go with the old screw method. Can’t thank you enough!
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