Either the sensor is broken or Your gaug on the dash is not working.
The gauge has failed.
The 1990 Ford Aerostar Maintenance Information manual says 21 gallons.
It might fit but it will take you a while.
The proper gap for 1990 aerostar spark plug is .044. This was taken from Dept of Motor Vehicles in Delaware. - Bill R. Jr.
You have a 21 gallon tank.
In a 1990 Ford Aerostar : You either have the 3.0 liter V6 engine or the 4.0 liter V6 engine from the factory ( each size of engine has 6 engine cylinders )
It's inside the gas tank
The distributor for a 3.0 liter in a 1990 Ford Aerostar rotates CLOCKWISE ( looking from the top ) The spark plug firing order is ( 1 - 4 - 2 - 5 - 3 - 6 ) The engine cylinder locations are numbered : 3 - 6 2 - 5 1 - 4 front of Ford Aerostar
in the engine compartment you have relays at lease on my 1993 i have 4 the no. 4 relay if removed car wont start try this. I have a 1990 aerostar 3.0, I shut it off and at the store, then wouldn't start, and I replaced the module on the side of the distributer and it fixed the problem.
A 1990 Jeep Cherokee malfunctioning fuel gauge can be caused by a broken ground wire. The gauge will not function if the fuel float in the fuel tank is broken.
1 - 4 - 2 - 5 - 3 - 6
21 gal. probably, full it up and see.
Under tyhe dash driver side
4 gauge wire.
A Haynes manual from Autozone and the like could have the answers you are looking for.
Its the 1x3/4 inch silver round fuse in the fuse box
Radio in 1990 Lexus LS400 stopped working, possible answer?
i have a 1990 ford ranger and my fule gauge always reads full, why?
answer for fuel filter. it is under vehicle driver side seating area.
You didn't say if it stalled once the temperature got to operating temp. I believe the 1990 Aerostar has the old style coil, at least mind did. Sometimes when a coil goes it operates fine when cold, but quits when it gets hot. Wotth checking.
i got a new oil sending unit which made my oil gauge start working but with both gauges not working i think you have a blown fuse
Working It Out - 1990 Foxhole 1-12 was released on: USA: 26 December 1990
Working It Out - 1990 Instructions 1-9 was released on: USA: 10 November 1990