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1998 Ford Expedition MAF Sensor/ Checking MAF sensor

Tiny
KEVINJRGASTON
  • MEMBER
  • 1998 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 207,700 MILES
What's an easy and good way to check the MAF sensor on a Ford Expedition 5.4L? It has thrown a code about reading too lean, I dont remember the code number, but it was reading too lean on Bank 1. I did a little research and found that the most common cause is a bad/dirty MAF sensor. I just cleaned it, but it is still idling higher than it used to, but no check engine light after I had it erased.
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Tuesday, August 10th, 2010 AT 11:26 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
If it isn't setting the same code, I think you fixed that problem. I have to say this, the MAF will not only affect one bank of the engine. It will have an effect on both. How high is it ideling at this point?
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Tuesday, August 10th, 2010 AT 11:22 PM
Tiny
KEVINJRGASTON
  • MEMBER
  • 17 POSTS
Between 1&1.5
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Wednesday, August 11th, 2010 AT 7:58 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
1K isn't too bad, but above that is getting high. To provide the testing info, I need to know the exact engine size, 4.6 or 5.4L and the original code PO102 or PO103.
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Wednesday, August 11th, 2010 AT 9:43 PM
Tiny
KEVINJRGASTON
  • MEMBER
  • 17 POSTS
P0102 and 5.4
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Wednesday, August 11th, 2010 AT 10:17 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
I looked it up for you but you need specialized equipment to check it. It is about 4 pages long of tests.
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Wednesday, August 11th, 2010 AT 11:03 PM

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