2008 subaru legacy problem

Asked by May 21, 2016 at 09:32 PM about the 2008 Subaru Legacy 2.5 i Special Edition

Question type: Maintenance & Repair

So I recently put in an cold air intake and my vehicle was
driving well at first but then I started to notice it was
loosing throttle response. I took it home and turned it off,
then turned it back on and tried to reverse and it starts
jerking and the rpms were bouncing. It does the same when
I put it in drive! So I eventually backed out of my drive way
but the car only let's me accelerate to 20 mph or lower. Im
not sure what to do. I've pulled a code  p2109. The car
sounds bad when It idles. Idk can someone help?

1 Answer

8,060

Did you properly insert the MAF sensor? If not the ECM doesn't know how much air is being sucked in under throttle and therefore can't manage fuel injection. Further, CAI's NEVER work on the Subie 2.5i motors. Resell it online and go back to OE...there's plenty of air flow there. There's no inexpensive performance upgrade with this 2006+ variable- valve motor. Just treat your OB to H or V-rated nice rubber and be happy.

Your Answer:

Subaru Legacy Experts

  • #1
    Anthony_60
    Reputation
    1,330
  • #2
    F_O_R
    Reputation
    860
  • #3
    TheSubaruGuruBoston
    Reputation
    850
View All

Related Models For Sale

Used Subaru Impreza
175 Great Deals out of 22,139 listings starting at $1,950
Used Subaru Outback
293 Great Deals out of 40,985 listings starting at $995
Used Subaru Forester
261 Great Deals out of 33,436 listings starting at $1,400
Used Honda Accord
574 Great Deals out of 103,380 listings starting at $950
Used Toyota Camry
761 Great Deals out of 72,912 listings starting at $1,000
Used Subaru Impreza WRX
34 Great Deals out of 1,093 listings starting at $2,900
Used Honda Civic
366 Great Deals out of 49,151 listings starting at $500
Used Subaru Impreza WRX STI
12 Great Deals out of 569 listings starting at $7,990
Used Nissan Altima
741 Great Deals out of 66,558 listings starting at $1,499
Used Toyota Corolla
614 Great Deals out of 66,450 listings starting at $900
Used BMW 3 Series
857 Great Deals out of 31,323 listings starting at $1,250
Used Ford Fusion
707 Great Deals out of 62,623 listings starting at $800
Used Toyota RAV4
518 Great Deals out of 78,882 listings starting at $1,995

Used Cars For Sale

2018 Subaru Legacy For Sale
8 Great Deals out of 5,804 listings starting at $18,905
2017 Subaru Legacy For Sale
35 Great Deals out of 1,166 listings starting at $12,995
2016 Subaru Legacy For Sale
20 Great Deals out of 704 listings starting at $11,888
2015 Subaru Legacy For Sale
42 Great Deals out of 1,395 listings starting at $8,991
2014 Subaru Legacy For Sale
15 Great Deals out of 420 listings starting at $7,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.