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1999 Ford Ranger MAF Sensor

Tiny
NATENICKNO
  • MEMBER
  • 1999 FORD RANGER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 78,000 MILES
Just bought the truck a week ago, was checking oil and noticed the MAF sensor was unpluged. Mind you the truck seemed to run OK. I went from a f150 v8 to the 4 cyl. For fuel economy. Anyway I pugged it back in and tried to start the struck, it started but ran poorly. I unplugged it and it ran like it did before. So I thought I would clean the sensor. I puchaced a can of sensor cleaner at the parts store and followed the directions on the can. This did nothing, If I pug it in it runs poorly or not at all. Isd the sensor bad or do I have a wiring problem to the sensor? I can use a multimeter but what should I check for?
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Saturday, September 6th, 2008 AT 9:21 AM

2 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
The Check engine light should have been on. Short of a visual check, you need a hand held diagnostic computer to check the MAF. IT probably is bad and isn't cheap either.
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Saturday, September 6th, 2008 AT 9:38 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
The other point is if the wires were shorted, it would run bad even unplugged. PCM is using a set midpoint value when unplugged. Online between 125.00 and 85.00.


https://www.2carpros.com/forum/automotive_pictures/62217_MAFFORD2_1.jpg

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Saturday, September 6th, 2008 AT 10:00 AM

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