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I have a truck with a full tank of gas (12-16 gallons?) that's been sitting for 12 months and I'm about to change the fuel injectors.

The truck can barely make it around the block due to stalling out under load. I've replaced the spark plugs and wires and verified they're all sparking (so ignition coil packs are fine), and I've replaced the fuel filter and determined that the fuel pump is fine. The next thing I want to try is replacing the fuel injectors.

I don't want the old gas to gum them up as soon as I get them in. Should I try to get the gasoline out of the tank before I put in new injectors? And if so, how do I do it and how do I deal with the old gas?

I would have a really hard time storing and getting rid of 16 gallons. I could burn the gas up by letting the truck idle for several hours, but that seems like a horrible thing to do.

2 Answers2

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If the tank was full up (or nearly full) there isn't a lot of space for the fuel to absorb moisture. If you can draw some fuel out to see how it looks, I'd go with that. If the gasoline is a rich amber color, consider getting it drained. If it's still fairly clear (towards looking like water), then it is probably fine.

Pᴀᴜʟsᴛᴇʀ2
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I'd get the tank drained and put in fresh petrol. Petrol does go stale, I've had it in less time but not a full tank so I was able to add more fuel to get going. Even a full tank will still be exposed to the air in the tank.

I'd imagine it'll be cheaper to drain the tank than get x number of new injectors. Depending on the age of the injectors, they can be cleaned if you suspect they are causing part of the problem.

DucatiKiller
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RemarkLima
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