Kev_A Posted May 16, 2010 Share Posted May 16, 2010 My car... '96 TT auto BPU Blitz Nur spec R with double de-cat and (afaik) 1.2 bar RR (Exhaust was on car when I got it) HKS SSQV FMIC BMC CDA Greddy Profec B EBC The car has always boosted fine and I've never had the boost set above 1 bar as I haven't fitted an FCD yet (I do have one ready to go on) Car's been off the road most of the winter but after I had the car M.O.T'd a few weeks back on the drive home I booted it and it made 1.5 bar! At first I thought some spanner monkey had been playing with my EBC but when I got home and checked all was well. I've since turned down all the settings and even tried turning it off but to no avail, it still overboosts. Any ideas? Quote Link to comment Share on other sites More sharing options...
Steve Posted May 16, 2010 Share Posted May 16, 2010 Which restrictor ring have you got? I have seen some very dubious restrictor rings fitted that have fallen apart from being to thin. Quote Link to comment Share on other sites More sharing options...
Kev_A Posted May 16, 2010 Author Share Posted May 16, 2010 I'm really not too sure mate, again, the exhaust was on the car when I got it, maybe I need to check this, where in the exhaust should it be located? Any recomendations for a replacement if this is the problem? Quote Link to comment Share on other sites More sharing options...
Steve Posted May 16, 2010 Share Posted May 16, 2010 People put them in different places mate. Some between the 1st/2nd decat, some after the 2nd decat. You should be able to see it between the joins though. A restrictor ring from CW or Whifbitz is a safe bet Also be worth checking all the pipework for the boost controller to check that is all ok. Quote Link to comment Share on other sites More sharing options...
Scott Posted May 16, 2010 Share Posted May 16, 2010 Sounds like something is up with the wastegate or the wastegate actuator to me. It is the first place I would check. Quote Link to comment Share on other sites More sharing options...
richarde7927 Posted May 16, 2010 Share Posted May 16, 2010 I had this only a few weeks ago and my car over boosted to 1.8 bar and blow the intercooler pipe off , the pipe from the boost controller valve to the waste gate on the second turbo had come off . Rich. Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted May 16, 2010 Share Posted May 16, 2010 1.5 bet it was quick Quote Link to comment Share on other sites More sharing options...
Scott Posted May 16, 2010 Share Posted May 16, 2010 1.5 bet it was quick Well past the efficiency. Will be blowing mostly hot air by that time. Quote Link to comment Share on other sites More sharing options...
Kev_A Posted May 16, 2010 Author Share Posted May 16, 2010 Thanks for the advice 1st thing tommorow I'll check the pipes from the solenoid and I'll get under the car and check the RR. Nigel as Scott M said, 1.5 bar is way out of the efficiency range for Stock J-spec turbo's, it reached that boost for a split second before I let off, was so quick fuel cut didn't have a chance to cut in! Quote Link to comment Share on other sites More sharing options...
Kev_A Posted May 16, 2010 Author Share Posted May 16, 2010 Sounds like something is up with the wastegate or the wastegate actuator to me. It is the first place I would check. How would you check if anything is wrong here? Quote Link to comment Share on other sites More sharing options...
Scott Posted May 16, 2010 Share Posted May 16, 2010 (edited) First thing to check would be the boost controller hose connected onto the 1st turbo at the front of the engine (wastegate actuator). If it has disconnected it won't control the boost pressure and you will get spikes. Other than that I can't be sure of how to check the wastegate as it is internal with the TT's. Manually pushing and pulling the actuators should let you know if they are ok. Just check them all. I've had one of them sticking leading to me losing pressure but never gaining it. Edited May 16, 2010 by Scott (see edit history) Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted May 16, 2010 Share Posted May 16, 2010 i was over boosting up as far as 1.71bar not sure if its a combination of cold weather and octane boosters and toulene/xylene, since i stopped adding the additives its come back to 1.4/1.5 bar. was wondering the car was mapped in a hot summer 25deg can the map adjust to when its down to 5 deg say. i really feel that the cold er weather really does give a power surge Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted May 17, 2010 Share Posted May 17, 2010 Seen as it has been boosting fine before you took it off the road it could be any of the above. Restrictor ring fell to peices (Dom special - cardboard or something) EBC tubes to check again. wastegate vsv?? wastegate actuator, boost controller solenoid foobared and stuck closed, split pipe(s) I'll see if I have some spare time to take a peek. Quote Link to comment Share on other sites More sharing options...
Kev_A Posted May 17, 2010 Author Share Posted May 17, 2010 Seen as it has been boosting fine before you took it off the road it could be any of the above. Restrictor ring fell to peices (Dom special - cardboard or something) EBC tubes to check again. wastegate vsv?? wastegate actuator, boost controller solenoid foobared and stuck closed, split pipe(s) I'll see if I have some spare time to take a peek. Cheers dude, I'd appreciate that Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted May 17, 2010 Share Posted May 17, 2010 When you had the MOT done, did they fit the second cat to pass emmissions.? If so, I reckon they've left your RR out. Quote Link to comment Share on other sites More sharing options...
Scott Posted May 17, 2010 Share Posted May 17, 2010 Good shout that Quote Link to comment Share on other sites More sharing options...
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