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F100 I Beam w/ straight 6 (original motor) I can drive for 5 minutes sometimes or for 30 minutes before it happens. Its so random, but it always happen eventually.
The truck has its original straight 6 engine with an aftermarket carburetor. We changed the gaskets on the carburetor and tightened all the hose clamps all around. Still there is a whistle. When I have the truck in idle it is very faint so its difficult to locate when i have the hood up. I assume its a pressure thing but two mechanics in my area can't figure it out and I am new to owning a classic vehicle.
The whistle can be from the carb and high vacuum, the noise is harmless but with that air cleaner you are going to hear it. I have to also ask why are you running 3 fuel filters?
I bought the truck as is last fall and have been going through it slowly on my off time. Not sure why he installed 3 filters but ill remove them as needed. I am going to change the air housing on the carb next week.
Is it me, or is the fuel pump on upside down? . There is a tee in the line on the side after the mechanical pump heading up to the carb. So is that a fuel return, or pressure from an electric pump?
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
