JayJay1374 Posted March 28, 2015 Share Posted March 28, 2015 I should start by saying The cars been sat for 4 months and is running BPU to 1 bar. The car ran perfect before I parked it for winter. Anyway getting weird boost on the first turbo. Foot hard down and the boost builds to about 0.4 bar then jumps up to 1bar but the car doesn't accelerate until the second turbo kicks in. So basically the problem is between 2000 and 4000 rpm. The car feels really sluggish to drive. I'm gonna try TTC tomorrow and see if it's any better. I'm thinking it's likely to be a vsv but any help is appreciated. Thanks Jonny Link to comment Share on other sites More sharing options...
supra_ufo Posted March 28, 2015 Share Posted March 28, 2015 sounds like a VSV to me mate, i thought you had some spare VSVs, worth giving them a go. I have a similar issue Link to comment Share on other sites More sharing options...
JayJay1374 Posted March 28, 2015 Author Share Posted March 28, 2015 I just sold them a few weeks ago Link to comment Share on other sites More sharing options...
Silver.bullet Posted March 29, 2015 Share Posted March 29, 2015 Which VSV would this be? I seem to be having the same problem with mine ever since the GReddy Boost Controller was put in. Almost like crazy lag and then the 2nd turbo comes one quite strong. Link to comment Share on other sites More sharing options...
supra_ufo Posted March 29, 2015 Share Posted March 29, 2015 (edited) its usually the top VSV, the one near to the back of the engine bay. IACV... Edited March 29, 2015 by supra_ufo (see edit history) Link to comment Share on other sites More sharing options...
Swampy442 Posted March 29, 2015 Share Posted March 29, 2015 I have a brand new one still in its bag for sale if you need one. Link to comment Share on other sites More sharing options...
Samurai 20V Posted March 29, 2015 Share Posted March 29, 2015 I had a similar problem a few weeks ago... IACV was at fault.. The other VSV's also seem to be at fault, got the car in TTC at the moment till some replacements arrive.. Link to comment Share on other sites More sharing options...
mellonman Posted March 29, 2015 Share Posted March 29, 2015 Are you sure its even turbo related, sounds like seized brakes to me, You make 1 bar from the first turbo but feels slow if im reading it right, take it for spin round the block trying to not use the brakes then feel if they are hot or some are hotter the others Link to comment Share on other sites More sharing options...
JayJay1374 Posted March 29, 2015 Author Share Posted March 29, 2015 It's not a brake fault. I've changed the IACV for one I found in my unit. Seems better but I'm still not making more than 0.5 bar on the first turbo. Link to comment Share on other sites More sharing options...
Samurai 20V Posted March 29, 2015 Share Posted March 29, 2015 It's not a brake fault. I've changed the IACV for one I found in my unit. Seems better but I'm still not making more than 0.5 bar on the first turbo. Did you check the workshop manual for the test procedure for the VSV? Best to confirm if the VSV u fitted is working. Link to comment Share on other sites More sharing options...
Silver.bullet Posted March 29, 2015 Share Posted March 29, 2015 I've changed the IACV for one I found in my unit. Seems better but I'm still not making more than 0.5 bar on the first turbo. Bud have you put a Boost controller in? When did you notice the problem? Link to comment Share on other sites More sharing options...
JayJay1374 Posted March 29, 2015 Author Share Posted March 29, 2015 Did you check the workshop manual for the test procedure for the VSV? Best to confirm if the VSV u fitted is working. I have not. Do you have a link? Link to comment Share on other sites More sharing options...
JayJay1374 Posted March 29, 2015 Author Share Posted March 29, 2015 Bud have you put a Boost controller in? When did you notice the problem? No boost controller. Just restrictor ring. Only noticed after using the car after being parked for winter. Link to comment Share on other sites More sharing options...
Samurai 20V Posted March 29, 2015 Share Posted March 29, 2015 I have not. Do you have a link? Check the home page, repair manual section.. Link to comment Share on other sites More sharing options...
JayJay1374 Posted March 29, 2015 Author Share Posted March 29, 2015 Running TTC now. Still no different expect it over boosts now. Heres a poor quality video to try and show what's happening. Link to comment Share on other sites More sharing options...
Samurai 20V Posted March 31, 2015 Share Posted March 31, 2015 If you have an EBC, the gain could be too high.. Link to comment Share on other sites More sharing options...
JayJay1374 Posted March 31, 2015 Author Share Posted March 31, 2015 I don't have a boost controller. But I think I've fixed it. Just stripped the pipes off which I removed when fitting new link pipes. Then refitted. All seems well now. Couldn't completely test as the weather was too bad for WOT. Link to comment Share on other sites More sharing options...
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