help please... how many cc should i run on my KO4?

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May 22, 2010 | 08:07 AM

#11

chocalotstarfish

Super Moderator

Joined: Dec 2009

Posts: 4,289

From: USA

Quote:

Originally Posted by JETSPEED333

sounds like it misses every once in a while... but the car fly's!

No CEL? No Worries!

May 22, 2010 | 01:25 PM

#12

JETSPEED333

Thread Starter

SoCal Crew Member

Joined: Nov 2006

Posts: 2,321

From: SoCal/ Norcal

no CEL =)

May 23, 2010 | 04:20 AM

#13

A4 2000

2nd Gear

Joined: Jul 2009

Posts: 794

From: Lancaster, CA

Quote:

Originally Posted by JETSPEED333

... so i'm just going to keep my 370cc injectors spraying about 330cc and deal with my sorta crappy idle.... sounds like it misses every once in a while... but the car fly's!

I noticed my car doing that once in a while but I'm all stock. It seems to do it less now though after a couple of fuel injector treatments. Could this be from a bad fuel filter or something?

May 23, 2010 | 08:54 PM

#14

Mike-2ptzero

4th Gear

Joined: Apr 2008

Posts: 3,274

From: Phoenix, Arizona area

Quote:

Originally Posted by JETSPEED333

so i talked to an APR dealer and they said they don't have a program for the AEB with KO4.... they only recomend using a 4bar regulator.... so i'm just going to keep my 370cc injectors spraying about 330cc and deal with my sorta crappy idle.... sounds like it misses every once in a while... but the car fly's!

4bar fpr is better then runninng 5 bar but running a 3 bar is even better and that is because once you add on the boost and rising rate of the FPR the higher the fuel pressure the less fuel the pump flows. The higher pressure you run the quicker the pressure drops when the flow of the pump is not enough.

The biggest issue with running a K04 on a K03 is the fact that the tune is set with enough fuel at idle/PT/WOT. When you throw on larger injectors to fix a lean issue at WOT you end up with really rich fuel trim for idle/PT. This is why there are K04 tunes.

Have you checked your fuel trim readings(block 032) and your AFR readings at WOT?

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