my car runs great for the first 20 min to a half hour then starts accting up. it will spit and sputter, but if i let off for a sec then hit the gas a little harder it will clear out now its not shiff


Asked by Jan 04, 2015 at 01:26 PM about the 1999 Subaru Legacy 4 Dr L AWD Sedan

Question type: Maintenance & Repair

So affte its run for a half hour and starts spitting and sputtering, if i stop at a store put it in
park and leave running it will shift hard when i take off. So then if i pull over put in park
and rev the engine a little or shut off for ten min it wil all be fine for a little wile again.
Seems like its loadiing up but why is it shiffing ruff. It only shiffts hard when the engine
acts up. Any input on where to start.

1 Answer

John Laursen

Had the same trouble. Replaced the anti knock sensor and that worked. I have a 99 impreza outback. Ended up moving it about one inch from original spot also. It has 140,000 miles on it. Mine was caused by mainly piston slap. Use electrical grease on the plug also. Took 6 months and $$$ to find the trouble. AM.autoparts has it for $24.

Your Answer

Add photo

Related Questions

Search Subaru Legacy Questions

Subaru Legacy Experts

#1 Anthony_60
Reputation 960
#2 Nick Eidemiller
Nick Eidemiller
Reputation 670
#3 dandyoun
Reputation 590
View All

Related Models For Sale

Used Subaru Impreza"
218 Great Deals out of 8,025 listings starting at $1,995
Used Subaru Outback"
432 Great Deals out of 29,667 listings starting at $1,295
Used Subaru Forester"
351 Great Deals out of 19,314 listings starting at $1,099
Used Honda Accord"
1,258 Great Deals out of 78,695 listings starting at $1,400
Used Toyota Camry"
1,590 Great Deals out of 98,367 listings starting at $895
Used Honda Civic"
1,143 Great Deals out of 59,092 listings starting at $995
Used BMW 3 Series"
1,607 Great Deals out of 39,619 listings starting at $888
Used Honda CR-V"
1,503 Great Deals out of 80,989 listings starting at $1,695
Used Audi A4"
316 Great Deals out of 13,018 listings starting at $1,500

Used Cars For Sale

2017 Subaru Legacy For Sale
11,188 listings starting at $19,815
2016 Subaru Legacy For Sale
26 Great Deals out of 1,062 listings starting at $15,299
2015 Subaru Legacy For Sale
28 Great Deals out of 888 listings starting at $12,900
2014 Subaru Legacy For Sale
46 Great Deals out of 1,148 listings starting at $9,299
2013 Subaru Legacy For Sale
36 Great Deals out of 908 listings starting at $7,995