Replacement of MAF


#1

I have a check engine light on for my 2002 Ford Windstar. Auto Zone said the two codes that the computer is giving out (0171 and 0174) say I need to replace my MAF. However with the exception of the light being on I have no indication that anything is wrong. No hesitation, I have good power and acceleration. The van has 115K miles. Any suggestions?


#2

I had the same codes on my 97 Crown Vic. Try cleaning the sensor wires on your maf with contact cleaner. Did the trick for me. Good luck.


#3

Those codes mean that both sides of the engine are too lean. Some of the possible causes (as stated by Auto Tap, scan tool company): dirty MAF; low fuel pressure (could be caused by a dirty fuel filter); vacuum leak ( a gap somewhere, or a disconnected/ cracked vacuum hose, a pcv valve, excessively open egr valve). Do a vacuum check on the engine. You’re looking for a vacuum of 17 to 21 inches hg (normal). Check fuel pressure AFTER changing the fuel filter and air filter. Pour a bottle of Techron Fuel Injector Cleaner into the gas tank.