Fuel Tank Leak and Erroneous Fuel Gage Readings on 1999 Isuzu Rodeo

Recently my daughter's 1999 Isuzu Rodeo reference car's
VIN: 4S2CM58W2X4368131., was leaking gas and still is upon filling the tank. Apparently it will not leak fuel if only filled half way or half a tank. According to the mechanic, there is an upper seal around the upper portion of the fuel tank that is responsible for this to happen. in addition the fuel gage is giving erroneous or false readings. It will show half a tank when she fills it to half then jump up to a full tank read, then bounce down to empty, then back to full or half??? Really wild or weird, but we believe its all relative to the leak itself?
Is there anyone else out there whom has experienced the same type or like problem. We would really appreciate your comments or feedback. Email: vargasbe315@yahoo.com or AZYKERP@GMAIL.COM
I read something similar to this online, but it pertained only to the fuel gage, don't know maybe that person is experiencing same type of trouble,
Could this make another possible case for a manufacturing defect or recall???
Ben Vargas

Asked by for the 1999 Isuzu Rodeo
I just sent you an email regarding this. I have a fuel gage that completely stopped working. ISUZU states "there is NO RECALL though the gas tank float and/or reastat are faulty". They state it can be one or both causing my gage not to read. They also stated that the deal must recalibrate the computer after it is fixed, using TBS# sb00-02-s002. I have also found the relay switches on my rear wiper to malfunction.
2 more answers
The seal /gasket for the fuel pump is a common issue. Also fuel sending units can be an issue as well if your tank reading is off. You can replace both in one shot. Its fairly easy, but it takes some muscle, space and time to do, I did it on about 3 hours on my wife's 2002 rodeo sport. If you are going ot try this get the right part umbers (Try St Charles Isuzu 636-441-4481. The sending unit is a kit that comes with the sening unit, gasket and general instructions. if you search on line you can find write ups on the whole procedure. There is a decent write up here:
I've had the same problem with my 99 rodeo. It was the fuel filler neck. that fixed the leaking but the gage is still wonky. I just make sure to keep an eye on my milege