What voltage should a Ford MAF sensor read at idle?

Per the MAF sensor transformation table, at idle (engine at normal operating temperature) the MAF should read 0.8 volts; 20 MPH = 1.0V, 40 MPH = 1.7V, 60 MPH = 2.1V.

What is the correct resistance for Ford EFI fuel injectors?

The component resistance table lists INJS (injectors) at 7 to 16 ohms.

What are the TR/MLPS sensor voltage values for each gear position?

P = 4.41V (4.16K ohms), R = 3.60V (1.44K), N = 2.83V (733), D = 2.09V (401), 2 = 1.37V (211), 1 = 0.68V (81). Values are calculated for VREF = 5.0V and may vary +/- 5%.

What should the ECT or IAT sensor read at normal operating temperature (around 194°F)?

At 194°F (90°C) the temperature sensor should read 0.61 volts with a resistance of 2.8K ohms.

What resistance should the IAC valve measure?

The chart lists IAC resistance as 7 to 13 ohms.

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1984-96 Ford EFI Sensor Values Chart - MAF, ECT, TR, DPFE & Solenoid Ohm Specs

Sensor values reference chart for 84-96 EFI with sensor resistance tables and voltage graphs

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Reference chart of 1984-96 EFI sensor values listing MAF, temperature and pressure sensor voltages, resistances and graphs.

AI caption February 2011 · Photo 506 of 1799

This reference sheet, titled "Sensor Values '84-96 EFI," compiles diagnostic sensor specifications for Ford EFI systems from 1984 through 1996. It includes four graph/table pairs: (1) the NSS/MLPS/TR (transmission range) sensor, showing expected voltage and resistance for each shifter position (P through 1, e.g., P = 4.41V / 4.16K ohms), calculated for VREF = 5.0V ±5%; (2) the MAF sensor, giving voltage values at idle (0.8V) and at 20, 40, and 60 MPH (1.0, 1.7, 2.1V) with the engine at normal operating temperature; (3) the temperature sensors (ECT, IAT, and TFT), giving voltage and resistance values across a range from 302°F/160°C (0.12V, 0.54K ohms) down to -58°F/-50°C (5V, 127.574K ohms); and (4) the DPFE/EGR pressure sensor, correlating pressure differential (PSI, IN-HG, kPa) with output voltage. A side table lists resistance specifications for solenoids and actuators including CANP, EPC, EVR, FC/LFC, FP, HFC, IAC, IMRC, injectors (INJS 7–16 ohms), shift solenoids SS1/SS2/SS3 (AX4S), TCC, and WAC/CCRM. Useful for testing sensors and solenoids with a multimeter on 1984–1996 Ford EFI vehicles.

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Frequently asked questions

What voltage should a Ford MAF sensor read at idle?: Per the MAF sensor transformation table, at idle (engine at normal operating temperature) the MAF should read 0.8 volts; 20 MPH = 1.0V, 40 MPH = 1.7V, 60 MPH = 2.1V.
What is the correct resistance for Ford EFI fuel injectors?: The component resistance table lists INJS (injectors) at 7 to 16 ohms.
What are the TR/MLPS sensor voltage values for each gear position?: P = 4.41V (4.16K ohms), R = 3.60V (1.44K), N = 2.83V (733), D = 2.09V (401), 2 = 1.37V (211), 1 = 0.68V (81). Values are calculated for VREF = 5.0V and may vary +/- 5%.
What should the ECT or IAT sensor read at normal operating temperature (around 194°F)?: At 194°F (90°C) the temperature sensor should read 0.61 volts with a resistance of 2.8K ohms.
What resistance should the IAC valve measure?: The chart lists IAC resistance as 7 to 13 ohms.