BorisSobad wrote:No driving without the gas cap has no effect.
That is still good, as you can rule out the vent system.
the next step is a little more difficult.
Now we need to determine if you have a problem on the supply side or pressure side.
Do you have an extra on eof the small see through fuel filter, and a bit of extra fuel hose?
If you do:
Set up....
Ensure that you have a clean fuel filter installed both ahead and behind the fuel pump.
start it up, and drive it until it dies, then tell us which filter is empty.