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Old 05-02-2021, 01:01 PM   #1
ilovedemhotrides
Scooby Newbie
 
Member#: 326147
Join Date: Jul 2012
Location: Philly
Vehicle:
2004 STI
wrb

Default Can someone look at these logs?

Erratic idle, high idle, and car is not happy.
Not sure why the rpms are so high at idle, and after revving Rpms drop low/ car will almost die.

Replaced 02, new spark plugs, drained gas, and nada.

Drivers side spark plugs good, passenger side were fouled indicating a rich condition.


https://docs.google.com/spreadsheets...Wl0ThNaAk/edit
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Old 05-04-2021, 10:33 PM   #2
Subie_
Scooby Specialist
 
Member#: 419354
Join Date: Apr 2015
Chapter/Region: MAIC
Location: Newark, Delaware
Vehicle:
2007 STI
Crystal gray metallic

Default

Quote:
Originally Posted by ilovedemhotrides View Post
Erratic idle, high idle, and car is not happy.
Not sure why the rpms are so high at idle, and after revving Rpms drop low/ car will almost die.

Replaced 02, new spark plugs, drained gas, and nada.

Drivers side spark plugs good, passenger side were fouled indicating a rich condition.


https://docs.google.com/spreadsheets...Wl0ThNaAk/edit
It's adding fuel like a mofo. Excessively positive fuel trims indicate a vacuum leak or faulty MAF sensor.
DAM dropping to .5 isn't good, but it could be a reaction to knock caused by lean conditions as a result of the leak.
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Old 05-14-2021, 06:56 PM   #3
ilovedemhotrides
Scooby Newbie
 
Member#: 326147
Join Date: Jul 2012
Location: Philly
Vehicle:
2004 STI
wrb

Default

Quote:
Originally Posted by Subie_ View Post
It's adding fuel like a mofo. Excessively positive fuel trims indicate a vacuum leak or faulty MAF sensor.

DAM dropping to .5 isn't good, but it could be a reaction to knock caused by lean conditions as a result of the leak.


Thanks for the help.
So the car is at the tuning shop, they found a crack in my downpipe near the flange. They said this could be causing the issue, but on second thought.... even if it’s right on the flange, this is the exhaust, so this wouldn’t even cause this erratic fuel adding right??

Am I missing something ???


Also I boost leak tested the car, and the only leak was at the BOV, it’s a turbo XS and I’ve heard that they sometimes leak during boost leak tests, not sure if this is my issue or not.
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