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1999 Kia Sportage backfire number three cylinder

Tiny
GLEN42
  • MEMBER
  • 1999 KIA SPORTAGE
  • 189,000 MILES
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
Monday, August 19th, 2013 AT 12:34 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check to see if your vavles are adjusted correctly. Then check for a vacuum leak
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Monday, August 19th, 2013 AT 7:08 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
The hydraulic valve lifters have to be relieved of pressure if the valves were lapped.
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Monday, August 19th, 2013 AT 7:17 AM

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