Hard start after fuel up?

[DJ metadelic]

Sending unit maybe??

[cb7_reverand]

Here's an auto technician's theory. That be me by the way.

Your sending unit is the cause of the gauge misreading. You'll need to change it to fix the inconsistances you are noticing. its what the pump is attached to.

as far as the hard start goes... Your pump is probably starting to get weak. Gas itself is the coolant for the fuel pump. Those who only fill up at near empty will always have replace a pump sooner than those who top off as they go. Your pump may just be getting low as well. One note here as well, over time your tank will accumulate water vapour from the air itself and it will condense inside the tank and settle to the bottom. when the tank gets low the extra sloshing will cause the pump to start to pickup more of the water as it tries to mix, though homogenously.

I'd start out by changing the fuel filter and seeing if this helps out. it could be full of water and junk. if nothing changes, then go ahead and pull the tank and change the sending unit and the pump.

Word to the wise, just having someone check fuel pressure will not condemn a pump, you will have to have them "flow" test it. See how much it will pump out in 20 secs, this should be about a 20once bottles worth of fuel. a good test to do before you yank a full tank!

[91kid]

Here's an auto technician's theory. That be me by the way.

Your sending unit is the cause of the gauge misreading. You'll need to change it to fix the inconsistances you are noticing. its what the pump is attached to.

as far as the hard start goes... Your pump is probably starting to get weak. Gas itself is the coolant for the fuel pump. Those who only fill up at near empty will always have replace a pump sooner than those who top off as they go. Your pump may just be getting low as well. One note here as well, over time your tank will accumulate water vapour from the air itself and it will condense inside the tank and settle to the bottom. when the tank gets low the extra sloshing will cause the pump to start to pickup more of the water as it tries to mix, though homogenously.

I'd start out by changing the fuel filter and seeing if this helps out. it could be full of water and junk. if nothing changes, then go ahead and pull the tank and change the sending unit and the pump.

Word to the wise, just having someone check fuel pressure will not condemn a pump, you will have to have them "flow" test it. See how much it will pump out in 20 secs, this should be about a 20once bottles worth of fuel. a good test to do before you yank a full tank!

This is more what i was looking for... Thanks.. I am going to get a fuel filter next week and hope it helps.. It just worries me everytime i do it if the batteries gonna die before it fires

[cb7_reverand]

I dont know anything about the evap system for the fuel. But obviously its got something to do with the pressure in the tank, because it seems like everytime you release it, the vehicle needs to build that pressure back up in order to run. IDK much about fuel systems, but maybe the return line is plugged a lil, causing the pressure to take longer than normal. Or maybe your fuel pump is getting tired and relys on the extra pressure to feed the fuel.
Just some ideas. maybe check fuel pressure before and after you take the gas cap off.

The evap system is only on the car to burn the vapors that are created within the gas tank as the gasoline evaporates. The car will allow so much pressure within the tank for two reasons. One to test the system, to see that all the required hoses and such are working and that the environment is being protected from the fumes. and Two to create pressure so that the fumes when ready will actually go into the engine. The evap system will almost never cause a running or starting problem. they will only turn on a check engine light. I say almost never, but there are freak occurances here and there.