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Need to know which sending unit you speak of, there are several on that vehicle. I don't know of any sending unit on the engine, that doesn't just unscrew. You take the electrical connector off and unscrew the unit by loosining it and turning counter-clockwise.. It will probably be tight so use the right tool. Get the new unit and put it back in and reconnect the electrical connector(plug) That is fine unless it is the fuel gauge sending unit.
I have an 87 2.5L and the sending unit is located just in front of the distributor and perpendicular to the cylinders. It does however aim just a little towards the back of the truck and the electrical connector slides right on and off. It does not have a locking tab on the connector. My specific version has three prongs on it. Hope this helps!
It's on the back side of the engine. Take off the elctrical connector then put the special sending unit socket on it and turn it cc to take it off.
I assume you mean in a car's engine. To get the best answer, you need to be more specific. First, drain the engine's oil. Second, disconnect the electrical connector from the sending unit. (usually one small wire with a push on/pull off connector) Third, use a socket which fits over the (usually six) flat sides of the sending unit. This may be a standard socket, OR, You may need a special socket to remove the sending unit. You may be able to loan out the tool needed from AutoZone or you can buy it from NAPA auto parts. Fourth, turn the tool counter-clockwise. Installation is the reverse of removal.
2.3 turbo, V6 & V8 ARE THE SAME. wire #29 is Y/W YELLOW/WHITE FROM THE SENDING UNIT TO (CONNECTOR C440) TO (CONNECTOR C285) ON THE INSTURMENT CLUSTER THIS WIRE GOES FROM THE SENDING UNIT TO THE INSTURMENT CLUSTER THEN ON TO THE LOW FUEL WARNING MODULE READING FROM SENDING UNIT SHOULD BE EMPTY 60 to 66 OHMS FULL 8 to 12 OHMS IF YOUR FUEL GAUGE IS OFF THEN I WOULD CHANGE THE GAUGE GOTO E-BAY AND BUY THE "ELECTRICAL MANUAL" the wire from the fuel pump relay to the pump is #787 PK/BK PINK/BLACK
The wire connector has a clip on the side of it, follow it from the wire side onto the unit, it will end just on the sensor side, lift it up slightly while pulling the wire connector back.
The temperature sending unit on a Ford V10 gas 6.8 liter is on the front of the cylinder head. It is a true sending unit and not just an on and off switch.
I have a 2002 Trailblazer LT Ext that I have had some problems with also. My windshield washer sending unit would come on by itself even if the vehicle was off. Just so you know, it was not the unit itself it ended up being the relay under the hood in the fuse block. Removing the actual unit should be fairly easy. Unplug the wiring harness from the top of the sending unit by lifting up on the retaining tab and pulling away from the sending unit at the same time. There is a rubber seal on the connector, make sure not to loose it when you unplug the connector from the sending unit. The bottom should pop out of the tank with some pulling. The bottom of the unit is pressed into the lowest part of the tank like a cork. That's it. Brad
snap off
I have an 82 Sabre and solved this by removing the battery probe and inline resistor, it unplugs from the sending wire at a connector a couple of inches from the probe. Connect the sending wire to any positive wire, insulate the connection to avoid shorting the electrical system. I kept the old connector intact and saved probe in case some time I will want to reinstall the battery probe.
* Relieve the fuel pressure * Remove the rear seat * Remove the fuel pump/fuel level sending unit access cover.Disconnect the electrical connector from the fuel pump/fuel level sending unit assembly and set the cover and wiring harness aside * Hold the sides of the fuel line quick disconnect connector,completely depress the connector tabs and pull out the tube inserted in the retainer.Disconnect both fuel lines * Remove the fuel pump/fuel level sending unit six mounting screws * Carefully meneuver the fuel level sending unit assembly out fuel tank as far as possible * slide the hose clamp down the hose and remove the hose from the fitting * Disconnect the fuel pump electrical connector from the cover * Set the fuel level sending unit and cover assembly aside * Reach inside the fuel tank,depress the lock on the fuel pump housing and withdraw the fuel pump and housing assembly from the fuel tank * Carefully pry the fuel strainer off the fuel pump.Remove the fuel hose from the fuel pump outlet fitting * Depress the locking tabs and separate the two halves of the fuel pump housing * Remove the fuel pump from the fuel pump housing
Pull the wire off the engine coolant temp sending unit and ground the connector pin. If this pegs the gauge, replace the sending unit. A thermostat that is slightly stuck open will cause this as well. (Too long to warm up)