Sorento Misfire - no codes

Tiny
LIZZARD
  • 2005 KIA SORENTO
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 173,000 MILES

It's an 2005 LX 4X4. Plugs and wire replaced approx 12,000 kms ago. All was well until about 3 weeks ago. It misfires but no codes show when scanned. Misfire is most evident when under load.

While driving to and from work, I ran a recorder (CRRecorders) which scans (and saves) at 2 second intervals looking for a drop in rpm etc. - Anything glaring which may indicate where the problem exists. Nada

Any assistance is greatly appreciated.

Cheers
Here are some scan stats:
@idle
ST fuel trim B1 & B2 - 0.0
LT fuel trim B1 - 15.5, B2 13.3

IGN timing 10 - 12
MAF 3.69 g/s @ 800 rpm, 1.3v
ISC @47 Load@14 TPS@.76

There are two reading that I am not familiar with, I am assuming that they are KIA specific? ISC Real Time Adapt - 1, ISC Long Time Adapt - (-24)

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Wednesday, November 17th, 2010 AT 1:10 PM

2 Replies

Tiny
WRENCHTECH
  • EXPERT
  • 20,679 POSTS

According to your fuel trim data you have a lean condition. Eliminate all possibility of vacuum leaks and then I would do a pressure cleaning to the injectors. The cleaning may or may not do the trick even if the in injectors are at fault

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Wednesday, November 17th, 2010 AT 1:17 PM
Tiny
WRENCHTECH
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If you have the ability to do an injector balance test, that may be a good idea.

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Wednesday, November 17th, 2010 AT 1:18 PM

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