izools Posted March 27, 2014 Report Share Posted March 27, 2014 So I bought a '2000 330d a few weeks ago. Have now had it de-flapped, done a full Inspection II; the chap noticed some perished VAC lines which have been replaced and also some silly little box in line with the fuel pressure sensor that tricked the ECU into over-pressuring has been removed. Did a forté engine flush during the oil change and some additive through the last bit of fuel to help clean out the injectors etc. He also cleaned the EGR and inlet manifold. It still doesn't feel right, there's very little boost and even then it only really kicks in when you floor it, at the top of the rev range. Any ideas? Link to comment Share on other sites More sharing options...
simonlpearce Posted March 27, 2014 Report Share Posted March 27, 2014 Turbo leak perhaps or duff MAF? Link to comment Share on other sites More sharing options...
mit Posted March 27, 2014 Report Share Posted March 27, 2014 Sounds like MAF to me, but that would manifest itself really strongly. Recently my friend's x3 diesel had similar symptoms and I thought it was the MAF but actually it needed a terraclean after a few years of having no oil changes (or the wrong oil). Link to comment Share on other sites More sharing options...
TriggerFish Posted March 27, 2014 Report Share Posted March 27, 2014 I've just had this - was the pressure converter vacuum piping Link to comment Share on other sites More sharing options...
izools Posted March 27, 2014 Author Report Share Posted March 27, 2014 Oops posted in wrong section. My bad. Thanks guys will have a look at the weekend. I considered terracleaning in the past but it seems like quite an intense process and really don't want bills escalating quickly on the off-chance of a fix. It's a lovely car, but it is still 14 years old with 157K. It isn't worth spending a massive amount on it. Just dropped £400 for new tyres and £250 for Insp. II / De-Flap... Is this terraclean really any good? I.e. much better than some engine flush prior to an oil change and some additive in the fuel tank? I wonder how terraclean would resolve issues caused by lack of an oil change, as the terraclean fluids follow the path of the fuel, not the oil or coolant...? Could be VAC piping. Some was replaced yesterday but there might still be more VAC lines to look at. Or a sticky turbo actuator? /urgh Link to comment Share on other sites More sharing options...
TriggerFish Posted March 27, 2014 Report Share Posted March 27, 2014 You can actuate the turbo by hand to see if it's sticky or not Here's my recent thread, if it helps: http://www.e46zone.com/forum/topic/52286-330d-boost-issues/ Link to comment Share on other sites More sharing options...
mit Posted March 27, 2014 Report Share Posted March 27, 2014 No idea, I only assumed the oil change stuff based on what I was told about the car tbh, might equally have been rubbish fuel going in or filter not changed etc. Link to comment Share on other sites More sharing options...
simonlpearce Posted March 27, 2014 Report Share Posted March 27, 2014 Do a smoke test on it to check for leaks on the intake piping. Link to comment Share on other sites More sharing options...
izools Posted March 27, 2014 Author Report Share Posted March 27, 2014 Thanks for the tips guys, looks like I'll have a busy Saturday Link to comment Share on other sites More sharing options...
