What is causing subaru backfiring severely after head job done?

Asked by Jul 02, 2012 at 09:05 PM about the 2002 Subaru Legacy L Wagon

Question type: General

Blew heads on '02 subaru. Had replaced. After job done car starting backfiring severely. Severity increases when under load, especially when using air conditioner. Threw code saying third cylinder misfiring? Guy who did job said it was first, the plug. Nope. Then said it was the plug wire. Nope  Is still doing it and getting worse. I think it's the cylinder itself. Any ideas what else it could be?

2 Answers

55

hmmm well the thing might be 1 check out the electric wires out from the battery to the engine see if that needs replacing. 2 the spark plugs check them out. 3 see if there's any wear or damage to the engine and i mean the whole thing if 1 thing is out of place ur going to have problems 4. question for ya how many miles are on the car and what have u been doing to it for the last 10 yrs it might explain ur problems

the valves could be tightened too much, should be checked out

Your Answer

Subaru Legacy Experts

  • #1
    Anthony_60
    Reputation
    1,270
  • #2
    Nick Eidemiller
    Reputation
    740
  • #3
    dandyoun
    Reputation
    720
View All

Related Models For Sale

Used Subaru Impreza
230 Great Deals out of 22,664 listings starting at $1,995
Used Subaru Outback
394 Great Deals out of 36,593 listings starting at $1,200
Used Subaru Forester
383 Great Deals out of 39,877 listings starting at $1,500
Used Honda Accord
1,107 Great Deals out of 66,541 listings starting at $561
Used Subaru Impreza WRX
37 Great Deals out of 1,215 listings starting at $3,499
Used Toyota Camry
959 Great Deals out of 91,211 listings starting at $300
Used Honda Civic
707 Great Deals out of 65,175 listings starting at $999
Used BMW 3 Series
1,078 Great Deals out of 33,881 listings starting at $1,000
Used Honda CR-V
741 Great Deals out of 60,314 listings starting at $1,495
Used Audi A4
301 Great Deals out of 12,272 listings starting at $1,899
Used Nissan Altima
1,102 Great Deals out of 79,271 listings starting at $1,500

Used Cars For Sale

2018 Subaru Legacy For Sale
8,999 listings starting at $19,791
2017 Subaru Legacy For Sale
19 Great Deals out of 1,701 listings starting at $16,999
2016 Subaru Legacy For Sale
18 Great Deals out of 639 listings starting at $11,495
2015 Subaru Legacy For Sale
78 Great Deals out of 1,576 listings starting at $10,977
2014 Subaru Legacy For Sale
32 Great Deals out of 609 listings starting at $6,999

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.