98 Rodeo fuel gauge wrong and uses more gas

I have a 98 rodeo and the fuel gauge is not right, and the fuel light is always flashing. It has been like this for a couple of months. However, lately it seems like it is using a ton more gas than it used to. We are having to fill up like every 2 days. Any ideas I would appreciate the help

http://www.geocities.com/endre_rl/isuzufaq.htm#faq2

My gas gauge is wrong how do I fix it?

http://www.automotiveforums.com/vbulletin/showthread.php?t=193601

Fuel Sending Unit -- Recall in 6-8wks (post on 24Feb04)
"I was called by NHTSA and I was told to expect the fuel sending units on 98-99 Rodeo to be
recalled by Isuzu. They said expect 6-8 weeks."
You have a bad sending unit. If you are still in warranty you may get your dealer to replace it. If not you can purchase the sending unit without the fuel pump. The part number for the 1998-2000 Rodeo is P/N 8-25323-011-0. Cost ~36.00 from St. Charles Isuzu

http://www.forum.planetisuzoo.com/viewtopic.php?t=579

http://www.4x4wire.com/forums/showflat.php?Cat=&Number=419532&page=0&view=collapsed&sb=5&o=1&fpart=1#Post457023


http://www.geocities.com/endre_rl/isuzufaq.htm#faq8
I have lower gas mileage what can I do?

Might be due to, colder weather, winter grade gas, dirty PCV valve, dirty EGR, dirty fuel injectors, low tire pressure, front and/or rear end needs to be aligned, dirty air filter, weak battery or weak alternator. If you replace or clean any of the above pieces make sure you disconnect the battery for at least 15 minutes so the ECU will recalibrate itself

Also, you may have a dirty MAF sensor. This can easily get dirty if you are using an K&N type of oiled air filter.

-Ryan