need help 4.0 sohc

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  #1  
Old 10-15-08, 06:39 PM
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need help 4.0 sohc

both o2 sensers reading lean chaned fuel filter liight came back on 1 week later what else should i try
 
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  #2  
Old 10-15-08, 06:44 PM
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Please provide us with the year/make/model vehicle and the code.
 
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Old 10-15-08, 08:03 PM
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Originally Posted by tamhawk72 View Post
both o2 sensers reading lean chaned fuel filter liight came back on 1 week later what else should i try
sorry about that 2001 explorer sport trac
 
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Old 10-15-08, 08:07 PM
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need help 4.0 sohc

Originally Posted by tamhawk72 View Post
both o2 sensers reading lean chaned fuel filter liight came back on 1 week later what else should i try
it a 2001 ford explorer sport trac codes p0174 and p0171 system bank 1 and 2 too lean
 

Last edited by tamhawk72; 10-15-08 at 09:03 PM. Reason: forgot codes
  #5  
Old 10-16-08, 03:47 AM
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Both sides went lean at the same time????..........Check ALL vacuum lines. Pay close attention to the PCV line, specifically the rubber elbows that connect the plastic lines to the intake plenum........They're notorious for collapsing and splitting
 
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Old 10-16-08, 08:20 AM
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Intake manifold gaskets are probaby the culprit,I change them all the time for these codes.
 
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Old 10-21-08, 05:40 PM
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Originally Posted by wrench47 View Post
Both sides went lean at the same time????..........Check ALL vacuum lines. Pay close attention to the PCV line, specifically the rubber elbows that connect the plastic lines to the intake plenum........They're notorious for collapsing and splitting
is there a way 2 check 4 vaccum leaks i heard a couple but dont sond 2 safe
 
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Old 10-21-08, 05:46 PM
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The rubber hoses should not have any cracks, bulges, dryrotting, etc.
 
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