more issues driving me insane
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Joined: Jul 2010
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From: Northeast, OK
I asked because the Edelbrocks don't like as much pressure as you have, but the Holley should be fine. Do you know for sure your float level is correct? A very low level could lean it some.
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Freshman User
Joined: Jun 2013
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now this is a kicker in all these shannanigans. before I pulled the carb off yesterday and took it to my grandfather in laws garage so we could put the choke on it was perfect, pulled the sight plug rocked the truck a little and fuel dribbled out. Now I did it again today and nothing. we didn't mess with the float at all yesterday. after the trucks shut off I can hear fuel gurgling in the bowl almost like its boiling which is leading me to vapor lock right before the bowl
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Joined: Oct 2012
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You should be able to remove the bowl plugs while the engine is running and just see fuel start to dribble out. Not come pouring out mind you, but just drip out. Of course it's a cinch to remove the bowl and verify the float height anyway, so it's probably worth doing. And...when you put the vacuum gauge on the manifold, was the needle steady, or did it jump around a lot. If it jumps around a lot that would suggest a valve not seating, or a vacuum leak. A leak-down test can also confirm the valves are seating properly. If it's a new motor and you're getting black gunk on the plugs, you could be sucking oil from the valley side of the intake ports, which would be a vacuum leak. Ideally, before you bolted that manifold on you would've wanted to carefully make sure the angle of the manifold matched the angle of the ports of the head exactly, using feeler gauges. It's not unusual to have to get the manifold milled to correct alignment issues. Good luck!
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FTE Legend
Joined: Jul 2010
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From: Northeast, OK
I'm confused, but that isn't unusual. So, the engine is cold and when you start it the idle is slow and at only 15" of vacuum. But if you blip the throttle a couple of times it'll settle down to 19-20" for the rest of the day. Sounds like the choke was on and when you blipped the throttle it came off. You may have it adjusted a bit too rich, or it may be just right and you aren't used to a choke.
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Yes you got it when its idleing cold its at 15 and when I just tap the throttle a few times it jumps up to 20. And my choke is locked I don't have a cable for it to adjust it. I'm just wondering if that could fuse the back fire
FTE Legend
Joined: Jul 2010
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From: Northeast, OK
You didn't tell us all of this, or I sure missed it. When the engine is cold it is lean as the cold metal attracts fuel droplets and they come out of the mix, thereby leaning it. So it needs the choke as the engine will spit and bog when you try to make it pull a load on a lean mix. So either hook the choke up properly or don't drive it until it is warm. Otherwise you are going to blow power valves - the beauty of owning any carb designed by Holley.