listy Posted August 16, 2013 Share Posted August 16, 2013 As Ian has said, my first steps would be to check the vacuum pipes for leaks, and also check that the boost guage is actually plumbed in to the right place. Oh, and +1 on a video. It all sounds very odd to me, and none of it really makes much sense. If there is a way you can get a video with the boost guage, AFR guage, and the dash clocks in at the same time, and still readable, would be best I think. Maybe get someone sat behind you as you drive, recording it? Quote Link to comment Share on other sites More sharing options...
Guigsy Posted August 17, 2013 Share Posted August 17, 2013 (edited) Hadn't noticed this thread till I got pmed. To clarify a few questions... It's a uk car running full bpu. Arround 400ish bhp. Last time it was dyno'd it made 385 at 1.1 bar iirc. I ran it at 1.3 bar for close to 4 years. That's acceptable for uk turbos. Id never seen my car reach 2 bar. Or run at anything like 17 afr. That's very strange. 14 on the Afr is what it always says on idle. On boost it would settle to 11-12 as it should. Then when you let off on overrun it goes off the scale and reads - - - almost the same behaviour as on my single. Edited August 17, 2013 by Guigsy (see edit history) Quote Link to comment Share on other sites More sharing options...
Guest SL1D3Y Posted August 17, 2013 Share Posted August 17, 2013 Faulty lambda sensor on the afr? I wouldnt expect much more of an engine left if its truely running that lean! As for the turbos, a small crack in a vac hose can easily be missed, but would soon open up under any kind of load. Have you checked intercooler pipe work? Does it feel slower now than before? Any turbo blowback (chatter) or dump valve noises lifting off? Cheers Quote Link to comment Share on other sites More sharing options...
mellonman Posted August 18, 2013 Share Posted August 18, 2013 It not a faulty lambda sensor as it goes into closed loop trying to stay at 14.7, To be honest Im not sure what the actual symptoms are, need the video to see what is actual happening Quote Link to comment Share on other sites More sharing options...
marbleapple Posted August 20, 2013 Author Share Posted August 20, 2013 Resolved: http://www.mkivsupra.net/vbb/showthread.php?295252-Marc_P-Club-Spirit-Happy-Marbleapple&p=3718304#post3718304 Thanks for all your help guys. Quote Link to comment Share on other sites More sharing options...
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