Hi,

After a few minutes of driving at high speed I went to pass a lorry and the car became very unresponsive and slow. For the remainder of the journey the car was slow with no turbo spooling noise at 2k rpm in 2nd (there's normally plenty). There were no warning lights on or noticeable smoke from the exhaust. Today the car was back to normal. Was this the car going into limp mode or something more sinister?

Thanks

Hi,

After a few minutes of driving at high speed I went to pass a slow lorry and the car became very unresponsive and slow. For the remainder of the journey the car was slow with no turbo spooling noise at 2k rpm in 2nd (there's normally plenty). There were no warning lights on or noticeable smoke from the exhaust. Today the car was back to normal. Was this the car going into limp mode or something more sinister?

Thanks

Limp mode, reset when you turned the engine off and on. If it happened while overtaking and under load, possibly sticky VNT turbo vanes. Warm it up and treat it mean occasionally, VNT-equipped TDIs love it, the slaaaaags.

Someone here at work has a 2.0L PD with DPF which was recently going in to limp mode and was losing power. This happened shortly after one of his injectors went, which he had replaced FOC!

After a garage finding a loose or split boost pipe (can't remember which), the problem still remained. My first thought was sticky VNT, but it actually turned out to be a split in the VNT vacuum hose.

I'm not sure on the differences between engines, so maybe this won't apply... but then again, maybe it's worth giving the VNT vacuum hose a quick check.

Edited 29 November, 201114 yr by mark.r.cullen

Id guess you've heatsoaked the intercooler and the cars went into limp mode (stock intercooler is rubbish)

Either that or as said sticky turbo vains