I have an Audi A4 2006 (130,000 miles): My check engine light came on when starting the car the first time in about a week. Previously, I had noticed it was starting up a little rougher than normal but it seemed to drive just fine.
The dealership said they did the diagnostics and found that all four cylinders misfired at some point during the evaluation. They honed in on cylinder 2 thinking it was a bad coil, they moved the coil to cylinder 4 and found it also misfired right away. However, they continued to explain that even though that may help, that would not be the reason all 4 cylinders were misfiring. They believe it could be caused from carbon collecting in the engine and similar to Pitt, it would be roughly $700 because it takes 5 hours and is very labor intensive. - - I did not get the codes from them, I’m going to call tomorrow and ask.
Has anyone heard of this? Are they trying to pull one over on me or do you believe it could actually cause misfires in all of my cylinders?
On a slightly different note, they said during the diagnostics they found that the coolant fan module was misfiring or not acting properly. Therefore, my 2nd fan was not working and the 1st fan was having to work harder. They said with this issue, to replace the fan and the module would be $1150.
This all seems steep for a check engine light to be on, but not blinking. Any advice/knowledge around this would be appreciated!