what sensor controls the fuel relay
fuel pump relay
The engine computer controlls the relay.
The fuel level sensor is on the fuel pump, in the fuel tank.
the crankshaft pos sensor controls the relay switches which operate the fuel pump and the electricity supply to the coil causing no spark to reach the distributor YES
Yes, there is a fuse and a relay.
it controls the fuel injection part of some cars
It is under the driver's seat.
Check the fuel pump fuse & relay.
If you're looking for the fuel pump relay on that 94 S10 with the 4.3 L engine, it would be found on the convenience center located to the left of the steering column at the lower edge of the dash. I don't know of any "fuel relay sensor".
If the fuse that controls the PCM relay for the fuel heater on a 1999 diesel keeps burning out, perhaps there is a short somewhere in the wiring. There is also a possibility that the ground wire for the fuel heater is no longer attached to the frame.
me personally i would check the relay. because that's what basicly controls the fuel pump
if you mean the fuel cut off switch, its in the trunk.