OK, I'm not a carb guy at all.. just for some info. My problem is that between 1500 and 2500 rpms I have no power. I can't even make it up hills without over revving my truck to the point that my clutch gets smelly. I rebuilt my engine two years ago and did a transmission swap and an aluminum drive shaft conversion. So I do have some knowledge. When I did it two years ago, man did it have power. But sense then I moved to NY from Seattle and towed about 2000 pounds all the way here. So I have tired this little puppy out.

So not having power between 1500 to 2500, my other symptoms are that it backfires when my foot is off the gas. Backfires when I have the clutch Half compressed around corners. Also, it has no acceleration.

I have checked my timing (OK), clogged cat (OK), volts to MSD (OK), spark plugs (OK), some leaks around carb, and intake. So I will start there.

But I still think that it's a carb issue but I don't know where to start with that.

Do you guys have any ideas on what it might be in the carb (32/36 Weber) and how to fix it? Also where to look.

 

Sounds like the power valve but could be spray pump or just trash in a jet as junk collects in the bowls. They are easy to overhaul and the kits come with instructions. 1 can of carb spray and lay it out on a towel to catch springs/check *****. I don't think the kits come with power valves though.

 

What is a power valve, where is it located? Also the spray pump? I did hear a lot spray noises today after a fixed the leaky intake gasket when I stared my truck. Is there a website i can go to get some illustrations or instructions on those parts.