Cold Start Idle Problems

Started by Bej96, August 30, 2016, 06:21:22 PM

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Bej96

Most days When i start my 1.8T Mk4 it idles very bad for about 30 seconds then turns good. When it idles bad it sounds like its losing revs or simillar and trying to stall (sometimes it even does). It has a Check engine light thats always on and when we scan the code it come up with a 02 and or thermostat sensor issue. both have been replaced multiple times but the problem still goes on.

Anyone had a similar problem or know what the problem could be??

GLIDN

I'm going to go on a limb that you have an air leak in one or more hose.
The car is hunting on idle to adjust the short term fuel trims. To allow the car to run sufficiently will having long term fuel trims out of spec.
Audi A4 DTM - K04 NZ New | All bolt-ons | Carbon Clean done
2012 MK6R Golf |Stage 3+ | Stage 4 DSG | Tuned & Built by HSP Tuning