Thread: 1972 Chevy K30 Longhorn Build

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It keeps getting better. Last night I was driving home from work and I got caught behind some slow pokes next to a semi. Once the semi turned off the road I went around the pokes. I ran it a little hard but not thrashing it a few times having fun after that. This morning I took it to go meet a buddy to trade some parts with, and when I starting accelerating on the highway, I noticed was the truck was way doggy. Literally no power. I figured it was low on fuel. But the more I thought about it, the more I was thinking lack of fuel in the tank wasn't the issue. It wasn't coughing, bucking, nothing odd. After I met my buddy Dave, I went and put fuel in the truck. It took 7 gallons. Yeah, I figured it wasn't low fuel. This tank holds 16 gallons. So I took my middle child to school and went home and changed the fuel filters hoping that was it. I didn't see anything obvious but the fuel didn't look green like it normally does. My nose is semi plugged, but the fuel smelled like diesel, but not as strong as normal. I drove it to work and it's the same. Runs ok until about half throttle and then it doesn't do much. It'll run highway speeds, the engine doesn't heat up, still has normal oil pressure.

I need to put some gauges on it and see what is going on. First I thought maybe one of the turbos is locked up but they sound the same. Also, if that was the case it would be smoking black from lack of air. Same thing if the air filter was plugged/restricted. It will not hardly smoke. I foot braked it to see what would happen and it'll barely puff any smoke. Normally if you do that it will put some out. (Which I try to avoid any how) So, I'm leaning towards a weak lift pump, bad/watered down fuel, or I'm not sure yet. I'll see if I can put some make shift gauges on it for the trip home.

At least it still made it to work and I didn't have to drive the pos mini van. Haha