Mazda MPV This minivan was among the class leaders with its roomy interior and efficient powertrain.

2003 MPV engine missing

  #1  
Old 07-21-2009, 03:08 PM
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Join Date: Jul 2009
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Post 2003 MPV engine missing

My 2003 MPV started missing last week and the check engine light came on. It only missed when I put it in gear and take my foot off the brake, but it runs okay as soon as I give it some gas. I borrowed a code reader and I got P0174, and P0171 as a "pending code". My husband and I were thinking we'd replace the fuel filter, but would it be a waste of time?
 
  #2  
Old 07-21-2009, 04:11 PM
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That is a mixture balance issue, probably due to an air leak between the MAF behind the air cleaner and the engine. Check the corrugated duct VERY CAREFULLY for splits and leaks, temporary fix with ductape; permanent fix replace duct, under $50. Other than that, improvise a stethoscope and snoop around for air leaks, split tubing, etc. etc.
 
  #3  
Old 08-18-2009, 09:59 PM
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most of the time its your PCV hose
 
  #4  
Old 08-27-2009, 09:42 PM
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Join Date: Aug 2009
Posts: 3
Default Check the PCV hose

Check between the intake manifold and the fire wall. the PCV hose makes a 90 degree turn at that point and this is where it fails. With your hand you should be able to feel a smooth bump. If it is deformed and sucked in then it need to be replaced.
 
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