Just wondering if anybody can help me with this problem. A few months ago, I was driving up a hill on the highway, and out of nowhere my car started leaning out and backfiring through the carb. Once I got to the top of the hill, and levelled out, the car started running just fine. But from then on, it would start to bog at about 65mph when you were heavy on the gas, like passing somebody on the freeway. Light throttle, and the car ran just fine.
The problem seems to be getting worse now. Even giving it like 50% throttle up hills, it bogs really bad. I used to be able to make it through gears 1-4 without problem, and then 5th would start bogging. But now, it seems to happen in every gear. If I'm super light on the throttle, everything is fine.
I've replaced the fuel filters, replaced the fuel pump. I thought maybe the fuel pump wasn't keeping up with the carb. So then I tore down the carburetor, I soaked it in that big ass can of NAPA carb cleaner for 20 minutes, then blasted out every passage I could with compressed air, and I replaced EVERY part on the carb with new parts. I checked the float level, and it looks perfect as far as I can tell.
Any other ideas or suggestions? I feel like there is a clogged passage still on the secondary barrel, but I was so goddamn diligent rebuilding the carb. Oh yeah, and I thought maybe it was a clogged cat in the exhaust since it always pinged really loud when I'd shut the car off, so I took it out, and replaced it with some pipe, and had the same problem...
Could it be a spark related issue? Maybe a weak coil pack? I replaced the plugs and wires, but maybe the spark just isn't good enough for a heavy load? Is that even possible? Any ideas would be awesome... I'm all out of them, and I'm super frustrated.