What does the misfire sensor do on the 1996 5.8L engine?

Per the diagram note, it is used to identify changes in crankshaft rotational speed to indicate cylinder misfire. It connects via connector C115 with a 917 DG/LG wire and a 651 BK/Y wire inside a misfire sensor shield.

What are the fuel level sender resistance values?

The sender is a variable resistor: 145 ohms when the tank is full and 22.5 ohms when empty. Resistance is low when fuel is low and high when fuel is high.

What wire feeds the fuel pump module and through which connectors?

Circuit 787 PK/BK feeds the fuel pump module, coming from C202 (page 25-1) through the inertia fuel shutoff via connector C271, then through C205F/C205M and C441F/C441M.

What does the inertia fuel shutoff switch do?

It opens on impact, cutting the 12V feed (circuit 238 DG/Y, present when the relay is energized) to the fuel pump circuit.

Where does the fuel pump module ground?

Through wire 57 BK to splice S400 and then to ground G100 (see grounds, page 10-5).

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1996 Ford Bronco 5.8L Wiring Diagram - Misfire Sensor & Fuel Pump Circuit 25-6

96 Bronco 25-6 Engine Controls 5.8L wiring diagram: misfire sensor/shield, inertia fuel shutoff, fuel pump module, instrument cluster

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Engine controls wiring diagram for 1996 Ford Bronco 5.8L showing misfire sensor, inertia shutoff and fuel pump module circuits.

AI caption July 2017 · Photo 247 of 386

This is page 25-6 of a Ford factory-style wiring diagram set, titled "Engine Controls, 5.8L," marked "96" (1996 model year), uploaded as part of a 1996 Ford Bronco documentation album. The left half shows the misfire sensor circuit: circuit 917 DG/LG and 651 BK/Y wires pass through connector C115 to the misfire sensor, which is enclosed in a shielded harness section; a note explains the sensor detects changes in crankshaft rotational speed to identify cylinder misfire. Grounds route through splice S127 and connectors C101F/C101M, C109M, and C165 to the Powertrain Control Module (PCM). The right half shows the fuel pump circuit: circuit 238 DG/Y arrives from C202 (page 25-1) through the inertia fuel shutoff switch (opens on impact), then circuit 787 PK/BK runs through C271, C205F/C205M, and C441F/C441M to the fuel pump module. The fuel level sender is a variable resistor (145 ohms full, 22.5 ohms empty) feeding the instrument cluster via circuit 29 Y/W. Grounds run via 57 BK through splice S400 to ground G100 (see grounds page 10-5). Cross-references point to the ignition system (page 21-1) and instrument cluster (page 60-1).

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Frequently asked questions

What does the misfire sensor do on the 1996 5.8L engine?: Per the diagram note, it is used to identify changes in crankshaft rotational speed to indicate cylinder misfire. It connects via connector C115 with a 917 DG/LG wire and a 651 BK/Y wire inside a misfire sensor shield.
What are the fuel level sender resistance values?: The sender is a variable resistor: 145 ohms when the tank is full and 22.5 ohms when empty. Resistance is low when fuel is low and high when fuel is high.
What wire feeds the fuel pump module and through which connectors?: Circuit 787 PK/BK feeds the fuel pump module, coming from C202 (page 25-1) through the inertia fuel shutoff via connector C271, then through C205F/C205M and C441F/C441M.
What does the inertia fuel shutoff switch do?: It opens on impact, cutting the 12V feed (circuit 238 DG/Y, present when the relay is energized) to the fuel pump circuit.
Where does the fuel pump module ground?: Through wire 57 BK to splice S400 and then to ground G100 (see grounds, page 10-5).