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05-13-2009, 11:58 AM | #1 |
Scooby Specialist
Member#: 25731
Join Date: Oct 2002
Chapter/Region:
MWSOC
Location: Ft Wayne, IN
Vehicle:02 wrx(sold)/2005 Sti/ 93 Leg Wag |
Another Utec/Idle/Cams question
I've seen a couple other threads regarding the subject, but none that pertained directly to my situation.....Looking for input from people that have actually dealt with this.
I have some Kelford custom 272 cam that like to cause the motor to die on idle. I've tried a few obvious things already but don't seem to do the trick. Starting off, the car never dies after cold start, only after it warms up. When cold, it's lopey (as expected) but not horrible. So far I've kicked up the idle in the ecu as far as 1100 rpms. The fueling is about right on afr-wise but I have played with 0 column values in the utec, adding and subtracting fuel. I also put some timing values in the 0 column, like around 14deg up to 1500 rpms, and played around with low rpm 10% column values as well. The thing is, when driving and coming to a stop, it wants to drop all the way down and then come back up, so upping the idle doesn't do much to help because it's not "catching" it on decel. Once it dies it wants to die every time after that as well. Given that temperature seems to make a difference, I'm wondering what I can do to work with that?
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05-13-2009, 12:46 PM | #2 |
Citizen Mick
Member#: 27646
Join Date: Oct 2002
Chapter/Region:
NWIC
Location: Portland, Oregon
Vehicle:2003 Sleeved 2.5 Oil Dry Sump Goodness |
If this is a drive by cable then use the idle stop screw and crack open the butterfly a little. Once you have done that go back into the UTEC and recalibrate the TPS to ensure that it reads zero.
If this is a drive by wire then drill a small hole in the butterfly. You need more air flow. Don't open it too much otherwsie the idle will be too high |
05-13-2009, 12:54 PM | #3 |
Scooby Specialist
Member#: 25731
Join Date: Oct 2002
Chapter/Region:
MWSOC
Location: Ft Wayne, IN
Vehicle:02 wrx(sold)/2005 Sti/ 93 Leg Wag |
Excellent idea, thank! I should have mentioned it was a 02 wrx.
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05-13-2009, 01:11 PM | #4 |
Scooby Specialist
Member#: 41561
Join Date: Aug 2003
Chapter/Region:
MWSOC
Location: Chicago
Vehicle:04 GT3076 2.1 Stroker = Broken 3rd |
HA, i just fixed this yesterday. I had the same exact problem. Mick's idea works, as its the same thing i did.
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06-08-2009, 10:09 PM | #5 |
Scooby Specialist
Member#: 51684
Join Date: Jan 2004
Location: CO
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What size should the hole be on a dbw?
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06-10-2009, 01:25 PM | #6 |
Scooby Specialist
Member#: 41561
Join Date: Aug 2003
Chapter/Region:
MWSOC
Location: Chicago
Vehicle:04 GT3076 2.1 Stroker = Broken 3rd |
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06-16-2009, 09:44 AM | #7 |
Scooby Newbie
Member#: 110177
Join Date: Mar 2006
Chapter/Region:
Tri-State
Location: South Jersey
Vehicle:2011 WRX 4Dr SWP RIP 2007 LGT SpecB 524whp |
add 2-4 degrees of timing in the low load rpm areas with OS. i had the same issue and it fixed mine... i have same cams and all
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06-19-2009, 01:09 PM | #8 |
Scooby Specialist
Member#: 41561
Join Date: Aug 2003
Chapter/Region:
MWSOC
Location: Chicago
Vehicle:04 GT3076 2.1 Stroker = Broken 3rd |
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