I have a misfire in cylinder 1 and I can't figure out for the life of me what it is. I have replaced the spark-plugs (NGK Double Platinum) the coil packs and the camshaft position sensor. It shakes at idle but when driving its fine. When I put the code reader it came back with P0301 and P0343. Which it misfire cylinder 1 and camshaft position sensor. We cleaned the fuel injectors and changed the camshaft position sensor and with the camshaft sensor it got a little better, with us cleaning the fuel injectors it didn't change anything. I heard maybe a pcv valve, and I may have got to cheap of coil packs but I dont want to keep guessing and buying parts that aren't fixing the problem. I have to smog it soon but with the check engine light on its not going to pass. I only have had the car 2 1/2 weeks and got to drive 2 times. Please anyone who can help me i would appreciate it. PLEASE HELP ME!!!!
How long has your 2006 Audi A4 Quattro had this problem?
RepairPal Certified shops can diagnose and repair your 2006 Audi A4 Quattro. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
So frequently, I read of concerns from folks who "just got the car" and it's so disappointing, that folks out there sell their cars or even trade their cars in without any remorse in passing along critical problems to unknowing new owners. So sorry to hear.
You didn't mention which engine, but I'm pretty certain you have a high pressure fuel pump at the engine and direct injection fuel injectors at each cylinder. In Audi's, I'm familiar with the fact that these fuel systems create excessive unresolvable carbon build up on the valves and cylinders. Typically the head must be removed from the engine and serviced, cleaned, and de-carboned.
I can't say this is for sure for you, but it's not uncommon, that's for sure.
Have you performed a base engine compression test? A leak down test? That would be helpful.
