Take it to a service shop.
Don't get a pos Isuzu Rodeo
This is such a broad question! What is it doing to make you ask "how to fix?"
Replace Replace
Replace the fuel cap.
i had a quote of $3900 for my 2002 rodeo 2.2L
you drop the fuel tank and replace the sending unit
I've read around $800-$1k if you take it to a shop..
they all lose oil dont fix it cause you cant it will always leak
Knock sensor needs to be replace
Please be more specific.
First find where the 99 Rodeo is leaking fuel from. Check for loose or cracked fuel lines. The leak needs to be found before driving the vehicle, as the leak could cause a fire.
Buy a cleaning kit at Auto Zone or equal. If that does not work, you have to take it out to Radio Man. JPt