TravisUT
Junior Member
- Joined
- Dec 10, 2020
- Posts
- 13
- Reaction score
- 0
- Location
- Utah
- First Name
- Travis
- Truck Year
- 1984
- Truck Model
- C20
- Engine Size
- 454
I have a Quadrajet carbed 454, basic factory setup: stock mechanical fuel pump with heat shield-wrapped rubber fuel line (away from the block), factory-style tank and factory style sending unit with 2 fuel lines running the frame rail of the truck.
Two issues/questions:
- When the outside temperature is hot, after driving the truck for 20 mins or more and stopping, I can hear hissing coming from the tank/sending unit. The sending unit is the factory-style, 3 outlet kind, with the middle outlet as the vent. Is the hissing sound normal for hot days, or is something not working right?
- Also on hot days, after driving the truck for awhile, sometimes the engine will just die. Generally happens after driving, and then sitting in a drive-thru, sitting at a stop light, etc., and then when I try to accelerate again, it dies. I can immediately start it again by cranking the engine and pressing the accelerator pedal about half-way; when it starts, I rev it a couple of times, and I’m good. Is this vapor lock, or something else?
Any tips on either of these?
Two issues/questions:
- When the outside temperature is hot, after driving the truck for 20 mins or more and stopping, I can hear hissing coming from the tank/sending unit. The sending unit is the factory-style, 3 outlet kind, with the middle outlet as the vent. Is the hissing sound normal for hot days, or is something not working right?
- Also on hot days, after driving the truck for awhile, sometimes the engine will just die. Generally happens after driving, and then sitting in a drive-thru, sitting at a stop light, etc., and then when I try to accelerate again, it dies. I can immediately start it again by cranking the engine and pressing the accelerator pedal about half-way; when it starts, I rev it a couple of times, and I’m good. Is this vapor lock, or something else?
Any tips on either of these?