hyouriittai

Hey guys, I picked up an 1979 HA10 (unfortunately named 1979's "510" in the American marketS) a couple of months ago. It has an inline-4 L20B in it. The thing ran great, I mean awesome, when I drove it down a good 180 miles from where I bought it. It's supposed to have the original 75k on everything. However, as soon as I got it in to town, it started having this had hesitation problem. Past (approximately, because I don't have a tachometer) 3k RPM, it would stop giving the motor any gas (maybe not an accurate description, just how it felt.) This was while driving. So, I picked up an FSM and took a look at what the problem might have been. I decided to overhaul the carb (DCH-340 series, I believe), as that seemed to make the most sense to me: dirty jets, bad float, something. When I took it apart, the float (made of some sort of synthetic) seemed to have been eaten away. Made sense; constant exposure to gasoline for nearly years. So I replaced the float and all the little bits that came in a NAPA carb rebuild kit that was specific to my carb model (of course.) Anyway, I got it running. However, the problem seemed worse. I estimate that it revs only to about 1.5 - 2k RPM. If you open up the throttle any further past that, I just hear his hissing sound, and the engine wants to die. So, what are the possibilities? I know there are a lot. Fuel pump? Fuel line/hose leak? More carb problems? Or something else entirely? I appreciate any input, and thank ya all in advance. -Matt