Question about 2005 Yamaha Road Star Midnight Silverado

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Too much negitive pressure in gas tank

There is so much negitive pressure in my gas tank that it is sucking my gas tank and causing the tank to **** in and it made a dent in my tank. Also the gas cap is extremely hard to remove

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Wat kinda bike u got. if a dirtbike, u need to check and clean the inside of that hose that comes out the top of a gas cap, thats the only place were air can get it in to let the pressure out and regulate the gas going in. if its a street bike ask sumone else i dont **** with that ****

Posted on Feb 02, 2009

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Posted on Jan 02, 2017

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I have a 2003 silverado, it starts fine in the morning but the rest of the day it cranks for a long time before starting. turning the key on and off a few times doesn't help. I have had the fuel pump


If the fuel pump is inside the gas tank, remove the gas cap, to equalize the air-pressure inside/outside the gas tank. That should let the fuel pump "suck" the gas from the tank.

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I have a 2001 carburated polaris virage tx jet ski. It builds up pressure in the gas tank and I can take a piece like this off and the pressure comes out of the hose. The hose hooks on to the black end of...


I don't know much about jet skis but it sounds like its building pressure in the gas tank as you have said..Does it have the original gas cap.. Sometimes the original caps have a very small vent hole. People replace them with one that dont....if it was a car it would be called Vapor lock....it's when the pressure in the tank becomes greater then the fuel pump..Might be a little hose that goes to the carb... Supposed to burn fumes..if it's clogged it builds pressure in your tank... Something like this is going on..If you take the gas cap off and hear air sucking into tank this might be your problem..Hope this helps..

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1999 MERCURY VILLAGER BOGS WHEN GOING UP HILL WHEN ONLY 1/8TH TANK OF GAS FILLE IT UP AND THEN STILL BOGGED FOR ABOUT A MILE THEN QUIT BOGGING WHAT CAUSED THIS


when a tank is empty there is no fuel for the pump and the system runs low on fuel pressure Going up hill the fuel runs away from the pick up line and the pump sucks air
After filling it takes a while to empty the air out of the system to allow full pressure again. It is an extremely costly practice to run so low on fuel as it may lead to a pump replacement

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1 Answer

2003 Chevrolet Silverado 4.3 V6 with MFI. Engine ran not start.


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1 Answer

Fuel tank problems


check to see if any normal tank vent lines are plugged up or disconnected ..some also have a fuel recirculation setup on them.. when its lower in fuel level the gas will bubble into the tank causing pressure buildup..

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Are you leaking gas? maybe it's sucking air and your not getting enough pressure when throttled. I found a little leak on my truck right by the tank, not dripping but tube is shot so it sucks air and kills the pressure so when i press gas pedal it's dieing or stalling...

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2 Answers

What cause gas tank to have pressure


this is normal, 100%,
if it truly is pressure and not a vacuum sound?
my wild guess , head the gas cap go whooooosh... as you unscrewed it? this pressure is normal.
the is a feature set of the EVAP system.
ask for help here
http://www.fixkick.com/bbs2/Suzuki-bbs/forumdisplay.php?fid=2
if how ever, it sucks, air called a vacuum, that means the gas cap is wrong. (for sure)
the correct cap has vacuum breaker valve inside, if missing
the gas tank will implode and engine stalls.
proof of that
http://www.fixkick.com/INJECTORS/tanks/collapsed.jpg

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1 Answer

Mazda astina 323 1991 hatchback cuts out turning right but only once half a tank of fuel is reached


Your pick up line in the gas tank either has a hole in it or is broken. This allows the fuel pump to suck in air and loose pressure. The M.A.P. sensor will then get a wrong readimg and cause the engine to die.. You will want to replace the fuel pump while you gas tank out and open.

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2 Answers

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vapor lock in the gas tank. Take off your gas cap if a lot of pressure comes out than get a gas cap

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