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1999 Kia Sportage Repair Question


Topics covered: Compression, Vacuum leak, Coil pack.
Mileage: 95,000 miles.

Asked on June 7, 2012

"misfire" codes keep coming back and engine will run rough.

Replaced spark plugs, both coil packs, and o2 sensors. upon start up, car will run fine for a few seconds, then start to run rough. scan and will get either #2 or #4 cyl. misfire code.
Avatar Asked by Dbatch

Answer

Replied on June 7, 2012

missfires come from, low compression, bad plug, bad coil, vacuum leak or injector issue. all these need to be checked before throwing parts at it. take your time and verify each item. i would start with a compression test.

Roy

Tiny Answered by ASEMaster6371 (expert)
24,973 answers provided
Replied on June 10, 2012

what should be a good compression reading ? all cyl. avg about 105.

Tiny Response from Dbatch
4 questions asked
Replied on June 10, 2012

thats not great but good enough. thats a good start.
Roy

Tiny Answered by ASEMaster6371 (expert)
24,973 answers provided

Replied on June 10, 2012

i'm at a lost at this point, what should i try next????? cant find any vacuum leaks.

Tiny Response from Dbatch
4 questions asked