Mechanics

MY AUTOMATIC WILL NOT ACCELERATE

2002 Subaru WRX • 165,000 miles

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


Avatar
Trevorgladfelter
April 15, 2012.



Check the fuel pressure. If it is ok, you may have a clogged cat converter

Roy

ASEMaster6371
Apr 15, 2012.
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

Tiny
Chopper
May 1, 2012.
Just spray it off with carb cleaner and plug it in.

Tiny
Chopper
May 1, 2012.
Note also check for torn air boot or disconnected air tubes after mass air flow.

Tiny
Chopper
May 1, 2012.