mkee87 Posted May 17, 2018 Share Posted May 17, 2018 My car was running fine, parked it for a few hours and now will only hit around 10psi. I've checked all the vacuum lines, exhaust manifolds, the ebcs, wastegate actuator, silicone joiners, no problems. Only things I saw was a lot of black caking inside the turbo housing and noticed that their might be a short in my obd2 port. Attached a couple logs too. Any insight would be much appreciated.datalog5.csvdatalog6.csv Link to comment Share on other sites More sharing options...
mkee87 Posted May 18, 2018 Author Share Posted May 18, 2018 Update: unplugged vacuum line to the wastegate and still not breaking 10psi Link to comment Share on other sites More sharing options...
relative4 Posted May 18, 2018 Share Posted May 18, 2018 Can you describe the checks you've done on the wastegate? Have you made sure it's aligned properly and covering the hole completely, not offset? Pressure tested the actuator? Link to comment Share on other sites More sharing options...
mkee87 Posted May 18, 2018 Author Share Posted May 18, 2018 The check I did on the wastegate was hook a tire inflator to the vacuum line and see if the arm would move. Link to comment Share on other sites More sharing options...
relative4 Posted May 18, 2018 Share Posted May 18, 2018 Cool, that's a good actuator test. I'll assume you had a gauge on the pump and the actuator moved at the appropriate pressure. You may want to pull the downpipe to ensure the wastegate is aligned correctly and covering the entire hole. Although from your mention of the carbon buildup, I guess you did? Can you describe your check of the vacuum lines? Did you smoke test? Did you make sure the restrictor pill is in the right location? Link to comment Share on other sites More sharing options...
mkee87 Posted May 18, 2018 Author Share Posted May 18, 2018 For the vacuum line test I gave them all a visual inspection, they were all replaced with silicone hoses 1yr ago. Don't have the restrictor pill anymore, was removed when I went with my ebcs. Only thing I haven't done yet is pull the downpipe and check for shaft play and inspect the actual wastegate flapper. Link to comment Share on other sites More sharing options...
relative4 Posted May 18, 2018 Share Posted May 18, 2018 Can you provide a full list of mods? Any changes since your last tune? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted May 18, 2018 Share Posted May 18, 2018 I just looked at your second log *6.csv... Two questions/comments: 1. Have you paid attention to your 'normal' WGDC at WOT? When you are around WOT in your log, I see WGDC around 50%. Do you recall if that is what you are supposed to reach? 2. I need to check on my car, but I am pretty sure that under boost and WOT, both your intake AVCS should be advancing. Mine are around 10-11 degrees IIRC (cars are stage 2). In your log, they are both zero at one point when you're still 'wotting'! Coincidentally, it has learned to pull timing right when the AVCS decreases to ~0. I would think that is strange. Unless you are tuned this way?? Keep in mind I am no tuner Link to comment Share on other sites More sharing options...
mkee87 Posted May 21, 2018 Author Share Posted May 21, 2018 The full list of mods I've got are: Cobb accessport w/ ia tune Cobb intake w/box Grimmspeed uppipe,crosspipe, intercooler, aos, crank pulley, ebcs Invidia less downpipe, q300 exhaust The only thing I have yet to check is the actual wastegate flapper, I've been avoiding pulling the downpipe like a plague Link to comment Share on other sites More sharing options...
relative4 Posted May 21, 2018 Share Posted May 21, 2018 Looks lke you also may not have smoke tested yet? Out of curiosity, who is ia? And you haven't changed any hardware since they tuned you, correct? Link to comment Share on other sites More sharing options...
JmP6889928 Posted May 21, 2018 Share Posted May 21, 2018 Wastegate bushing moved and the wastegate is now open a bit. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted May 21, 2018 Share Posted May 21, 2018 Heeeeey JmP, are you back at making turbo spool better? Link to comment Share on other sites More sharing options...
mkee87 Posted May 22, 2018 Author Share Posted May 22, 2018 Welp, pulled the downpipe and have no cracks on the housing, no shaft play, no impeller damage and the wastegate is opening/closing fine Link to comment Share on other sites More sharing options...
mkee87 Posted May 22, 2018 Author Share Posted May 22, 2018 https://photos.app.goo.gl/0AHhcQ2GBkhFJhT02 Link to comment Share on other sites More sharing options...
xt2005bonbon Posted May 22, 2018 Share Posted May 22, 2018 Strange. Are you continuously logging and checking the things I have mentioned previously? I checked both of my cars and the AVCS angles definitely increase when you are under load. Link to comment Share on other sites More sharing options...
relative4 Posted May 22, 2018 Share Posted May 22, 2018 Smoke tested yet? Link to comment Share on other sites More sharing options...
mkee87 Posted May 23, 2018 Author Share Posted May 23, 2018 Well, got a good deal on a vf52 so just going to swap out and hopefully I'll be making choo choo sounds again this weekend Link to comment Share on other sites More sharing options...
relative4 Posted May 23, 2018 Share Posted May 23, 2018 Subbed for shortblock. Link to comment Share on other sites More sharing options...
mkee87 Posted May 23, 2018 Author Share Posted May 23, 2018 Lol, going to keep her right around 18psi, just figured if I am replacing the turbo might as well get one that has a little more to give later down the road. Link to comment Share on other sites More sharing options...
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