Ok at idle only mmmmm could it be the float adjustment is not correct? Now be careful in doing this look down the carb after a full warm up see if you see a drip coming from somewhere. Oh a good spot type light is great for checking this. If it does drip or if the top of the butterfly is wet then you are get close to where the problem is.
No drips, no wetness
Just for fun try richening the mixture (loosening the idle screws) and rev the motor between each 1/4 turn adjustment. Try each idle screw independently and then move them together. I am curious if despite the fact the carb was rebuilt the idle tubes might be clogged; either one or both. Just a thought... but if the idle smooths out a bit then it might be worth opening her up.
Also, when you say there is a stutter at 1500 rpm how far is your foot to the floor? Is it less or more pronounced at WOT compared to normal "lazy" acceleration?
Hey Spence.....tried that today, mo go. Set the screws back to 2 1/4 turns out
how about an intake or exhaust manifold gasket leak. my idle was all over the place until I fixed a gasket leak.
I think we might be getting close. This morning it was around 35* so popped the hood and started her up. Seems to be some sort of exhaust leak somewhere down there. Checked the flange where the pipe ties to the manifold, wasn't leaking, so guessing it is somewhere around the manifold. Couldn't really see anything, and Ironman
had to do too many errands so haven't hit the bolts with a wrench yet. Definitely gonna try and do some tightening tomorrow. Kinda surprised torque on these bolts are only like 23 lbs and 17 for 2 of them. Tonight gonna PB blast them all a few times.
Yesterday was on the highway and noticed when I take my foot off the gas doing 60mph or so (could happen faster and slower) I can hear a faint high pitched whistling sound, so gonna go out on a limb and say the gasket is bad for intake/exhaust and the whistle is a vacuum leak
Like I said, going to put a new exhaust on in the spring anyways, and was planning front pipe back, new cat and all, so kinda added a new manifold to the wish list ($175 or so
BUT......went on ebay when I got in about 15 minutes ago and found a used exhaust manifold and intake manifold with all the "stuff" still attached, auction ending "in 3 minutes". High bid was $.99, threw a bid of $3.00 at it and got it for $2.25 plus $20 shipping. Figure I can clean up these pieces and have them ready for the exhaust swap.
So, fellas, that's where I am. Like hunting for a needle in a big pile of needles.