Boost seems to have gradually dropped away over the last couple of days. I have pulled fuses, done an adaption run and had a quick poke around for loose hoses - can't find an easy fix - where do I start?
(2.3 lpt with speedparts stage 1)
Agree with Ylee. This has happened to me too . The wastgate actuator rod is attached to the turbo body by an 'R' clip. The clip breaks and falls off leaving the wastegate permanently open hence no boost. Check if the actuator rod has side to side movement. If that is the problem it should be an easy 15 minute fix job .
Well from waht you say, there are only about 4 area's
1. Can the air get into the turbo?
2. Is the air leaking out after the turbo under boost (the pipes can be deceitful and look fine until under booost)
3. Is the turbo working properly (if not it's usually acompanied with lots of exhaut smoke)
4. Is the apc faulty or restricting boost for some other reason (knocking, lean mixture etc)
5. do you have a big exhaust leak before the turbo
do not underestimate the tdi grunt ....
they do have a lot of torq so they accelerate pretty quickly but they do run out of puff (eventually !!)
there may be little or nothing wrong
maybe a few adaptation runs are in order ?
see billj 9000 site for details (bottom of the page )
up to 200 km/h on the Autobahn most VW or Audi TDIs, even the 90hp, are very, very quick. Here in Germany, they are often driven by businessmen who are used to driving fast. It is always a competition for me to outrun them, even in my 225hp Viggen.
I would go along with Philip on this one. Had a bit of a tossle with a VW Passat 1.8 diesel around the Sheppard's Bush round about. My, I had to engage the turbo into the top end of yellow on my gauge in order to shake him off....
As a pasing note: I then go taken on by a Porsche a 928S on the A406. I think he'll now have a healthy amount of respect for SAABs within street legal speeds .