Hi i have a ed ford sedan when i turn the ignition on the fuel gauge goes to full then drops to zero with the fuel pump disconnected totally

SOURCE: 1993 eb ford falcon

had same prob.
Remedy, spray lots of crc into and onto terminals on sender unit, blow off with air hose, see what happens,moisture and build up of dirt creates a bad earth.
iparish
Palmerston North
NZ

SOURCE: 2000 Ford F-150. The oil temp warning light came

Make sure the oil level is correct. If the engine bearings are getting worn, the oil pump is worn or it's screen plugged, that can cause low-RPM weak oil pressure. Try running with 'high mileage' oil at your next oil change and always replace the filter. At some point, you may need to consider overhauling or replacing the engine. Good luck!

SOURCE: THE FUEL GAUGE STAYS PAST FULL DOESN'T MOVE

USSUALLY WHEN GAGE GOES WAY OVERFULL IT'S A BAD GROUND
QUICK CHECK USE BOOSTER CABLE ONE END ON TANK OTHER END ON BATTERY NEGATIVE IF GAGE GOES OK MAKE UP SHORT WIRE FROM FRAME TO TANK SEEM LIP
AND ATTACH MAKE SURE METAL IS CLEAN

SOURCE: ford focus fuel gauge not working

it might be the floater inside the gas tank or the sending unit which sends the info to the ecu and tells you how much gas you have replace that and it should work, sometimes it can be a faulty cluster gauge too

Stephen

• 21873 Answers
• Posted on Dec 13, 2012

SOURCE: my check gauges light is on, oil hands goes over to zero, moves up, light goes off, when it drops back to zero, gauge light comes back on.

Well the warning light is supposed to come on if any of the gauges display a dangerous condition, such as no oil pressure.
You may have a faulty sending unit for the gauge, or a wiring problem, or the engine may actually be loosing oil pressure when the gauge drops.
You could replace the sending unit as a test, or have someone check the oil pressure with a mechanical gauge.