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

1999 KIA SPORTAGE
95,000 MILES
Avatar
DBATCH
  • MEMBER
  • 5 POSTS
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.
Jun 6, 2012 at 5:30 PM
Advertisement
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Have you checked compression yet?
Jun 6, 2012 at 6:14 PM
Avatar
DBATCH
  • MEMBER
  • 5 POSTS
checked compression, average is about 105 on each cyl. but i dont know what would be a good compression.
Jun 10, 2012 at 6:13 AM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
You have the 2.0L engine?If so it says compression is 188psi so that would be pretty low compression.
Jun 11, 2012 at 12:16 PM
Avatar
DBATCH
  • MEMBER
  • 5 POSTS
should i find a used head or have this one redone, problem is kind of short on cash. i had to replace the exhaust manifold, it was cracked in two spots about 3" long.
Jun 11, 2012 at 2:36 PM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Since the compression is low across all the cylinders i would check the cam timing.
Jun 11, 2012 at 6:05 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.