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maf96.jpg
maf96.jpg | Hits: 500 | Posted on: 12/14/18 | View original size (342.11 KB)

Original '96 5.8L MAF sensor (F5UF-12B579-BA, built 1996 Feb.19 - 2nd shift) & venturi

One of the screw heads (Tamper Torx 15) is epoxy-filled to prevent removal of the sensor from the body.

Possible replacement PN: MotorCraft AFLS186RM (reman)

Diagnostic Trouble Code (DTC) P0102 indicates the MAF signal went below 0.39 volts (refer to «Voltage to Mass Air Flow Conversion Table» below this Pinpoint Test) sometime during normal engine operation (Continuous) or during Key On Engine Running (KOER) Self-Test.

Possible causes:
-- Damaged MAF sensor.
-- MAF sensor disconnected.
-- MAF circuit open.
-- VPWR circuit open.
-- PWR GND circuit open.
-- MAF RTN circuit open.
-- MAF circuit shorted to ground.
-- Air Intake Leak (near MAF sensor).
-- Throttle Position (TP) system (possible closed throttle indication).
-- Damaged PCM.

l Check broken/loose air outlet tube clamps (throttle body and air cleaner assembly ends), cracks/holes in air outlet tube, worn gaskets between MAF sensor and air cleaner assembly. Service as necessary.
l Start engine and bring to idle.
NOTE: If a KOER DTC P0505 is present, go to Section 5A, «Powertrain Diagnostic Trouble Code (DTC) Charts». For A/T vehicles, if the engine stalls and cannot maintain an idle, go to «DC9».
l Run engine up 1500 rpm for 5 seconds, then bring it back to idle.
l Access MAF V PID (MAF PID) with a Scan Tool.
l Is the MAF V PID (MAF PID) less than 0.39 volts (refer to «Voltage to Mass Air Flow Conversion Table» at beginning of this Pinpoint Test)?

Yes
The MAF SIG voltage is lower than acceptable minimum. GO to «DC7».

No
For KOER reading between 0.60 and 1.00 volt (refer to «Voltage to Mass Air Flow Conversion Table» below this Pinpoint Test): GO to «DC15».
All others: GO to «DC2».

Voltage - 0.34 - 0.39 - 0.60 - 1.00 - 1.96 - 3.90
F-Series - 1.68 - 1.93 - 3.32 - 8.43 - 28.97 - 151.44gm/sec