1999 Kia Sportage backfire number three cylinder

1999 KIA SPORTAGE
189,000 MILES
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GLEN42
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  • 1 POST
Had head redone. Put it back on, timing is dead on. But its backfiring from intake. Ides rough, but no backfire when giving throttle at 200 rpm. Could this be a bad valve? New spark plugs and coils. Not giving a misfire code. Need help, thank you
Aug 19, 2013 at 12:34 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
check to see if your vavles are adjusted correctly. then check for a vacuum leak
Aug 19, 2013 at 7:08 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
The hydraulic valve lifters have to be relieved of pressure if the valves were lapped.
Aug 19, 2013 at 7:17 AM
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