boxpin Posted May 22, 2013 Author Report Share Posted May 22, 2013 Because it drops to 0 and doesn't go into vacuum. Only when you go into vacuum and give it gas after that it gives you boost. This is why I said to check all your connections. It will only get worse if it is. I have seen a hose with a split in it that would hold 5 psi, but blow open above that. It eventually ripped open enough that it wouldn't hold boost at all and the person finally found it. and it seems to be getting worse. Link to comment Share on other sites More sharing options...
dimka18 Posted May 22, 2013 Report Share Posted May 22, 2013 You can download ScanXL from torrent and use that to do some logging. Great program. Link to comment Share on other sites More sharing options...
boxpin Posted May 22, 2013 Author Report Share Posted May 22, 2013 Downloading... Link to comment Share on other sites More sharing options...
boxpin Posted May 23, 2013 Author Report Share Posted May 23, 2013 Installed and ran ScanXL and it actually worked. I dont know what I am doing with it so I selected a default setting for the monitoring. I recorded a run then took a look. The only thing I noticed that was fairly high was the spark advance went to 38...is that ok? I would need to know what to monitor to really be of help. Nothing stood out. Did a pressure test on the system. Took it up to 40psi and did not have any leaks. Any more thoughts? ScanXL settings? Link to comment Share on other sites More sharing options...
dimka18 Posted May 23, 2013 Report Share Posted May 23, 2013 Luchy said anything over 4 is okay. Mine goes alot higher then that under load. Regular driving jumping all over the place. Link to comment Share on other sites More sharing options...
Q-Ship Posted May 23, 2013 Report Share Posted May 23, 2013 are you smoking at all? Link to comment Share on other sites More sharing options...
Q-Ship Posted May 23, 2013 Report Share Posted May 23, 2013 nvm, I see you are holding boost Link to comment Share on other sites More sharing options...
boxpin Posted May 23, 2013 Author Report Share Posted May 23, 2013 Luchy said anything over 4 is okay. Mine goes alot higher then that under load. Regular driving jumping all over the place. did you mean to say 40? Link to comment Share on other sites More sharing options...
dimka18 Posted May 23, 2013 Report Share Posted May 23, 2013 Nope he said anything over 4 deg is okay under load. Cuz i sent him a vid of my log. And it was jumping up to 180deg. He said looks okay. If it falls under 4deg under load you got an issue. Link to comment Share on other sites More sharing options...
boxpin Posted May 23, 2013 Author Report Share Posted May 23, 2013 So your saying 4-180 degrees of advance is ok under WOT? That does not sound right. Link to comment Share on other sites More sharing options...
RedStar Posted May 23, 2013 Report Share Posted May 23, 2013 My first thought was also the wastegate. I just cant think what could possibly dump 20psi like that if its not a boost leak. I will be interested to see what it really turns out to be. Link to comment Share on other sites More sharing options...
RZT5 Posted May 23, 2013 Report Share Posted May 23, 2013 Even with wastegate flapper wide open, the TD05H will build and hold 5-7 psi, so I doubt it is wastegate related. Only things that come to mind are the turbo inlet pipe collapsing, a BOV malfunction, or a boost leak. What are you running for intake pipe (between air filter and compressor inlet)? I'd also check for any leaks along the BOV vac line or anywhere on the manifold pressure side of the BOV. Link to comment Share on other sites More sharing options...
dimka18 Posted May 23, 2013 Report Share Posted May 23, 2013 Im just saying what i was told. I have no idea how it should be. But mine goes up very high, Link to comment Share on other sites More sharing options...
fwdGTP Posted May 23, 2013 Report Share Posted May 23, 2013 Sounds like it has to be some type of intake restriction stalling out the compressor. Literally only explanation I can think of. Link to comment Share on other sites More sharing options...
boxpin Posted May 23, 2013 Author Report Share Posted May 23, 2013 Even with wastegate flapper wide open, the TD05H will build and hold 5-7 psi, so I doubt it is wastegate related. Only things that come to mind are the turbo inlet pipe collapsing, a BOV malfunction, or a boost leak. What are you running for intake pipe (between air filter and compressor inlet)? I'd also check for any leaks along the BOV vac line or anywhere on the manifold pressure side of the BOV. We can rule out a boost leak from the compressor side of the turbo to the throttle body. I pressure tested that and took it up to 40psi. I had a small fizzle at the water injection threads but nothing alarming. The BOV was replaced but both were HKS BOV's. For the boost to go away so fast you would think it would have to exit from something like a BOV but that thing does not whistle when this happens. Sounds like it has to be some type of intake restriction stalling out the compressor. Literally only explanation I can think of. The intake between the air box and the compressor is a home grown 'Snabb style' pipe, meaning its an aluminum J pipe that goes to a 90 deg silicone hose to the airbox. The 90deg hose is pliable and I guess technically could collapse. But, I opened the airbox and pulled the filter so the only restriction was the MAF. I think I heard a small 'psst' right before it happens, not totally sure but maybe is something from the tree? I am not sure there is anything that could be destructive from the tree. Link to comment Share on other sites More sharing options...
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