2004 Audi A6 - Rough Idle When Cold Hard Start Puff Of White Smoke And Forums Com

Author Dalbo 17 Aug 2026

This guide explores why your audi a6 might develop a rough idle, how you can diagnose the problem, what fixes work, and how to decide if it’s time to. A p0304 code indicates a misfire in cylinder 4, often caused. When i start it up in the morning when engine is cold, it would vibrate around 1200 rpm for about 30 sec to 60 sec., once rpm go down to 600, it would smooth out

Car Idles Rough But Drives Smooth: Fix Engine Issues

2004 Audi A6 - Rough Idle When Cold Hard Start Puff Of White Smoke And Forums Com

When it's bad, the car idles unsteadily in neutral, and may hesitate or stumble. Audi a6 3.0 rough idle and p0304 code diagnosis a6 3.0 models often face misfires causing rough idle and engine overheating during cold starts 2004 audi a6 rough idle

Repairpal will help you figure out whether it's your vacuum leak, spark plugs, ignition coil, or something else.

Every time when starting a cold engine (not driven for six hours or so) for the past couple of weeks, i have a rough idle for about 30 seconds, like the engine is misfiring. 2004 audi a6 quattro rough idle If you’re experiencing rough idling, here’s. After the engine warmed up a little, it ran great on the road, but still ran rough at idle around the lot

When i opened the hood, it sounded like the engine was knocking, but then i was told that the injectors make. Hi guys, i have started having issues when i start the car or i’m sitting at lights Initially i thought that it only happens when the engine is cold, but know i’ve had it when it’s warm as well Sounds like a defective o2 sensor you purchased

How To Reset an Idle Air Control Valve - Upgraded Vehicle

Might want to replace that with another one and/or check your connections again

I would look at the wiring going to and from the ecu to the. In this video i explain how to fix rough idle Rough idle can be caused by clogged idle air control, vacuum leak, stuck open pcv, stuck open egr, engine misfire, low compression and so on. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on youtube.

Rough idle no check engine light~~~~ easy fix, in this video i will show you how to repair your low idle problem quick and easy. Audiforums.com audi models audi a6 engine rough idle got fixed! Here is what they did