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2010 Forester Premium 5MT
5 Posts
Discussion Starter · #1 · (Edited)
Looking for some help. I have a 06 Forester that has been running a cel codes for a high idle and a lean bank 1 (P0507 and P0171 ) I’ve been trying to find the issues for month with not success.

Can’t find any vacuum leaks in engine bay, replaced both O2 sensors, replaced throttle body gasket, cleaned throttle body, replaced PCV valve, EGR valve, plugs and wires, and swapped the Maf sensor form another Forester.

Recently I’ve had a problem with starting when the car is hot. It will turn over and fire and start but slow shutter and die. I try two or three times with same results before I get car to start and run normal.

Anyone have any ideas? I was going to get a fuel pump today.
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