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Old 04-29-2014, 09:37 AM   #1
silverbullet67
Scooby Newbie
 
Member#: 314967
Join Date: Mar 2012
Chapter/Region: MAIC
Location: Parkton, MD
Vehicle:
2005 STI
Black

Default rough cold start problem

I recently built my motor and also did an fp red and dw850cc injectors and now on a cold start the car has a misfire. It has set a cyl 1 and 3 misfire twice in 3 weeks. When you start the car it idles fine for about 10 seconds gauge reads 14.6. Then I drops down to 12.0 for a few seconds then jumps to 16-17 and starts missing. After the car is up to temp I dont have any issues. The car has to sit more the 3-4 hours to have this problem. And I am still on a base tune right now also
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Old 04-29-2014, 12:41 PM   #2
trev762
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Member#: 280572
Join Date: Apr 2011
Chapter/Region: E. Canada
Location: southern ontario canada
Vehicle:
2011 sti sedan
plasma blue pearl

Default

Being on a base tune could be the issue until properly tuned.

Talk to who ever is going to be doing the full tune will be your best bet.
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Old 04-29-2014, 01:07 PM   #3
silverbullet67
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Member#: 314967
Join Date: Mar 2012
Chapter/Region: MAIC
Location: Parkton, MD
Vehicle:
2005 STI
Black

Default

That is kind of what I was hoping for. I have checked for vacumm leaks, compression, replaced injector orings (had a small leak)
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