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1983 - 2012 Ranger & B-Series All Ford Ranger and Mazda B-Series models

'01 4.0 SOHC MAF problem.

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Old Mar 1, 2008 | 10:02 AM
  #1  
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Pablo-UA
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From: Kiev, Ukraine
'01 4.0 SOHC MAF problem.

First of all I got P0171 (lean mixture) code.

Suggested vac. leak, bad air filter and dirty MAF.

Checked all. MAF is clean. Sparkly! but.... engine does not rev up! OK, i removed MAF from plenum but it was connected. No difference. Disconnected MAF. The same effect. So seems to my MAF does not work. May be it is bad wiering, but where?? Brother told me, that when he wgashed engine it ran well till was wet....

OK, I need wierind diagrams.....

Any suggestions?
 
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Old Mar 1, 2008 | 11:46 AM
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pintopower8
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From: Lancaster, PA
So you washed your engine, and as you were washing it the engine started running rough, then the code set? Am I getting this right? Did you by chance saturate your air filter?
 
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Old Mar 1, 2008 | 11:51 AM
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pintopower8
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From: Lancaster, PA
This is a bank 1 system adaptive too lean code. Did you knock off a vaccum hose with a pressure washer?
 
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Old Mar 1, 2008 | 12:14 PM
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No. When engine was wet all worked well. After washing, not before.

I suggest something is wrong with MAF ore MAF wiering.....
 
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Old Mar 2, 2008 | 06:40 AM
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herrero
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firing order ranger 01 4.0 hovc
 
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Old Mar 2, 2008 | 09:31 AM
  #6  
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Pablo-UA
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Well, looking at typical MAF I learned that voltage on its pin depend on air speed. The quation is can someone help me with wiering diagram, I suggest wiering is damaged (truck was in slight roll over acident) and now I have corrozed wires/connectors....
 
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