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Old 05-20-2020, 01:41 AM   #2
Zmanwrx23
Scooby Specialist
 
Member#: 438620
Join Date: Jan 2016
Chapter/Region: MWSOC
Location: Des Moines, IA
Vehicle:
2006 WRX Sedan
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Not sure if I can be of any help however I did experience a similar problem under different circumstances.

When I finished building my 2006 WRX it would do exactly as you described. Ran great cold and would start right up. Once it got up to temperature it wouldn't idle and if I let it idle it would die. It would turn over again but once warm you had to keep your foot in it to get it to idle. I traced my issue through some AP logs to a grounding issue for my front o2 sensor. The values it was showing on my logs made no sense and my tuner said the same thing. I looked and had forgotten to bolt back down a ground strap by the passenger side strut tower. I bolted it down, unhooked my battery and drained power from the car, then hooked it back up (I did this so my car could relearn how to idle) and I haven't had a problem since. Maybe a ground strap is loose or corroded to the point its no longer actually grounding? I'm not sure this is the case given this started after you flashed your tune but at least something to look at.

Also.......change those plugs
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