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 9:25 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
check the fuel pressure . if it is ok, you may have a clogged cat converter

Roy
Apr 15, 2012 at 9:28 PM
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CHOPPER
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  • 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
May 1, 2012 at 4:57 AM
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CHOPPER
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  • 16 POSTS
Just spray it off with carb cleaner and plug it in.
May 1, 2012 at 4:58 AM
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CHOPPER
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Note also check for torn air boot or disconnected air tubes after mass air flow...
May 1, 2012 at 5:01 AM