Mk5 VW Jetta, Sportwagen, and Audi A3 TDI forum
Hello all,
My 2011 A3 168,000 miles had been running rough at low speeds and idle for a week or two.
I ran two cans of Diesel Purge through it directly into the HPFP. No change in idle. I did get one low fuel rail pressure code. At the time I figured it was because I was feeding the HPFP...