74 F100 Stalling / back fire
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3rd Gear
Joined: Nov 2023
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74 F100 Stalling / back fire
I have a 74 F100 with a 360 and a four barrel Holley carb. We bought the truck, trailered it home.. the gas tank has been siphoned empty.
After new tires, battery and five gallons of gas it fired right up. Filled it with gas and drove about thirty miles home. It died one time on the wife in our neighborhood.
I put another five gallons of gas in it yesterday and drove it around. When I would stop at stop signs and go it would want to hesitate and almost die unless I caught it with the gas.
Today we drove it and I couldn't catch it before it stalled out at a stop light. When I take my foot off the brake and try to accelerate it would act like it was starving. I'd try and catch it and it would back fire.
I was thinking possible plugged fuel filter and screen in the carb.. since the gas tank sat empty for a while.. possibly a larger jet in the carb I don't know what it has in it now.
After new tires, battery and five gallons of gas it fired right up. Filled it with gas and drove about thirty miles home. It died one time on the wife in our neighborhood.
I put another five gallons of gas in it yesterday and drove it around. When I would stop at stop signs and go it would want to hesitate and almost die unless I caught it with the gas.
Today we drove it and I couldn't catch it before it stalled out at a stop light. When I take my foot off the brake and try to accelerate it would act like it was starving. I'd try and catch it and it would back fire.
I was thinking possible plugged fuel filter and screen in the carb.. since the gas tank sat empty for a while.. possibly a larger jet in the carb I don't know what it has in it now.
FTE Legend
Joined: Nov 2015
Posts: 30,912
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From: Angier, NC
If the tank sat empty I bet it is rusty and the rust will be so fine it gets pass the filter into the carb float bowl.
When you pull the carb apart and find rust it's time to replace the tank.
Do you know if all the rubber fuel lines have been changed for new stuff?
Todays gas eats the old hose from the inside out and part of that could be stuck in the carb.
BTW you do need to rebuild it or at the vary least replace the power valve.
On older Holley's when they back fire up the carb they blow out the power valve.
A new one comes in the rebuild kit.
Dave ----
When you pull the carb apart and find rust it's time to replace the tank.
Do you know if all the rubber fuel lines have been changed for new stuff?
Todays gas eats the old hose from the inside out and part of that could be stuck in the carb.
BTW you do need to rebuild it or at the vary least replace the power valve.
On older Holley's when they back fire up the carb they blow out the power valve.
A new one comes in the rebuild kit.
Dave ----
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3rd Gear
Joined: Nov 2023
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The fuel line from the filler neck to the tank has been replaced. I'd have to check from the tank to the engine. I was told the shop who put the carb on dropped the fuel tank and replaced all of the hoses.
I kind of figured with the tank dry, dirt / rust would get knocked loose when we filled it and drove it.
Thanks for the information regarding the power valve.
I kind of figured with the tank dry, dirt / rust would get knocked loose when we filled it and drove it.
Thanks for the information regarding the power valve.
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