I have a 99 Redeo, 50K miles, no problems til now. The fuel gauge has gone
beserk, the guage indicates a full tank for about 20 or 30 miles after
completely filling the tank Suddendly the guage goes to zero and the
flashing fuel pump light flashes on and off, this scares the heck out of you
the first time you see this problem. I had it into the Isuzu dealer and he
says there is a module that is bad, passes the indication from the sensor
module in the opposite direction. The dealer doesn't have the module and
says it is a 3 hour job to remove the fuel tank and replace the module, the
dealer is to call when the part comes.
I would surely appreciate any information from anyone with experience with
this or a similiar problem. I am not looking forward to a 3 hour job of
removing and replacing the fuel tank for the purpose of replacing the faulty
indication if that is the problem. Labor is 80 bucks per hour. I suspect
there is a bad electrical connection, or a bad float, other wise why would
there be a normal indication of fuel level although it lasts for only
minutes, seems to me that bad is bad now and for always. Seems we have an
intermitten condition, Normal condition and then abnormal. Your thoughts
and information would be appreciated. maybe the dealer is correct, They
have only been servicing Isuzu's for two weeks having bought out the former
Sounds like the sender in the tank I had the same in an 89 Bighorn except
that I got 150km before the gauge punged to the bottom.I dont know about the
Rodeo but the bighorn sender is on the front of the tank and only 5 min to
remove or refit.
I have a 88' pickup that works similar, but no flashing lights. The fuel
gauge works when I fill the truck up, but at about 40 miles it slowly works
it way down to indicate empty. I use the odometer to let me know when to get
gas. The empty light comes on at about 290 miles.
I had this problem on a different make/model (93 Taurus), my "Southern
Engineering" solution was to drain the tank by removing the plug at the
bottom of the tank, draining and leaving it open to air for a few days to
let everything completely dry out, replacing the plug and refilling the
tank with all new gas.
And no.. I didnt figure this out on my own.. a mechanic friend pointed out
the problem, and suggested that I have him replace it, but the unit was
more than my budget allowed at the time, and since I had another vehicle to
drive in it's place (my Rodeo :) ) I just drained the tank and .. Lots of
"gunk"And you would'nt BELIEVE the difference it's made. Runs smooth as
silk too now, as well as the guage functions properly
(I also poured two bottles of gas treatment and one bottle of water remover
AFTER I had drained the tank, and jumped up and down on the back of the
vehicle to slosh it around.. lots of "gunk" came out....)
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