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Old 02-08-2009
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Icon8 Sucking noise from fuel cap....

So recently ive been having problems with my truck..

The truck has a rough idle but when i press the gas and drive it, it drives well.
At idle i can hear a SUCKING noise coming from my gas cap, like every 5-6 seconds it will make this sucking noise. My guess was fuel pump? I take the cap off and the sucking noise goes away... Im stumped :( HEELLLPPP please
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Old 02-08-2009
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sounds like the gas cap is not sealed all the way and that sucking noise is air being leaked/sucked in?
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Old 02-08-2009
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idk but it's pissin me off lol
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Old 02-08-2009
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Go to autozone and pick up another gas cap, won't be much at all.
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Old 02-08-2009
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Quote:
Originally Posted by 04blackedge View Post
Go to autozone and pick up another gas cap, won't be much at all.
If I remember right, you can even get a locking gas cap for under $10.
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Old 02-10-2009
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bought a new cap lol... I have 30 more horse powerz :)
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Old 02-12-2009
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well the damn sucking noise still exists even with the new gas cap so im eliminating that's as the culprit :( any other ideas why this noise exists?
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Old 02-12-2009
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turn the truck on crawl under and look around lol
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Old 02-12-2009
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ill go check it out
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Old 02-12-2009
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check the filler neck
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Old 02-13-2009
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Canister purge valve is stuck open.
Locate the charcoal canister under the hood (drivers side of engine)
Follow the hose from the canister toward the engine , there will be a valve solenoid and then an inline switch.
Remove the solenoid and try to blow through it.If you can , then tap the bottom of it against a block of wood.If you can still blow through it then replace it.
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Old 02-13-2009
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oooooooooooo i will look for this, THANKS :)
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