my 2002 wrx automatic will not accelerate

2002 SUBARU WRX
165,000 MILES
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TREVORGLADFELTER
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  • 1 POST
will not accelerate seems like it is hesitating as if its not getting fuel i had half a tank i did get codes po420 and po 171 but my cel is always on. it was so bad i had to leave it sit
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Apr 15, 2012 at 2:25 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
check the fuel pressure . if it is ok, you may have a clogged cat converter

Roy
Apr 15, 2012 at 2:28 PM
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CHOPPER
  • MEMBER
  • 16 POSTS
Check mass air flow for dust on sensor wires. Especially if you are running a KnN filter or similar oiled filter... Subaru fuel pumps rarely go bad
Apr 30, 2012 at 9:57 PM
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CHOPPER
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  • 16 POSTS
Just spray it off with carb cleaner and plug it in.
Apr 30, 2012 at 9:58 PM
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CHOPPER
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  • 16 POSTS
Note also check for torn air boot or disconnected air tubes after mass air flow...
Apr 30, 2012 at 10:01 PM
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