FOSTA Posted September 7, 2011 Share Posted September 7, 2011 (edited) Hi guys I need a little help with my wastegate. It's a 50mm Xs power one. The problem is that its over-boosting. I fitted a 5psi spring to it when I first installed it. It worked fine. But the car has been sitting for about a month. I'm due to drive down to Ryan G for mapping tomorrow so I need to sort this!:-/ What I've done so far: I took a compressor to the waste gate side port and it opened with that. So I took it back on the road but still no joy! Ive checked the aem boost solenoid and that seems fine. I have the side port of the wastegate connected to the turbo housing and that T'ed to the boost solenoid. And the top port on wastegate connected to the other side of the boost solenoid. It worked fine on this set up when first installed. But I havnt drove the car in a while and after base mapping I've never put my foot down so wastegate never needed to open. Also I opened the wastegate again with pump and sprayed 3in1 copper grease on the shaft witch can take upto 1200 degrees of heat. Just to try and lube it up incase it was sticking abit. Anybody had a problem like this before or have an idea what it could be? Cheers jamie Edited September 10, 2011 by FOSTA (see edit history) Quote Link to comment Share on other sites More sharing options...
Nic Posted September 7, 2011 Share Posted September 7, 2011 Have you checked the wastegate diaphragm for splits? The XS Power wastegates are not known for their reliability. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted September 7, 2011 Share Posted September 7, 2011 XS Power... 'shudders' Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 7, 2011 Author Share Posted September 7, 2011 Have you checked the wastegate diaphragm for splits? The XS Power wastegates are not known for their reliability. No mate but I thought it might be that like. It's quite new aswell. It's abit of a pain in the ass to get to as I need to take the manifold off to get to it :-(. If the diaphragm has got holes or splits will it be all over the place with opening? Like say open at 7psi one minute then 9psi and most of the time not open at all? Or will it just not work? Thanks for your input mate Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 7, 2011 Author Share Posted September 7, 2011 XS Power... 'shudders' Tell me about it mate! Propa s**t but we live and learn and will not be going down that route again! Quote Link to comment Share on other sites More sharing options...
-Welsh-Stealth- Posted September 7, 2011 Share Posted September 7, 2011 i had a problem with my t61 spiking to a bar of boost when it was mapped at 8psi... turned out it was spiking because of a split bit of tubing from the wastegate to the intercooler piping. it would randomly spike, then eventually got worse. and then eventually it kept spiking constant.... turned out it was that vacum hosing that split and eventually got worse and broke. hope that helps Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 7, 2011 Author Share Posted September 7, 2011 i had a problem with my t61 spiking to a bar of boost when it was mapped at 8psi... turned out it was spiking because of a split bit of tubing from the wastegate to the intercooler piping. it would randomly spike, then eventually got worse. and then eventually it kept spiking constant.... turned out it was that vacum hosing that split and eventually got worse and broke. hope that helps Hi mate I did find a vacume hose with a small hole in it. It was the one going from the turbo housing to wastegate but I replaced that earlier today but it's still spiking quite bad. I've checked all vacume lines and replaced them but its still spiking! Thanks for your input mate ;-) Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 7, 2011 Author Share Posted September 7, 2011 On the 50mm wastegate (same style as the hks 50mm) there are 3 vacume ports 2 on the top and 1 on the side. Do I block off the middle vacume port on top or leave open to vent? But if I did block it off would it cause a problem as there is still another vacume port on the top but further to the edge that is connected to the boost controller? I will unblock it as soon as it stops raining and see if it makes any difference but I dout it just thought I'd ask as stranger things have happened lol. Quote Link to comment Share on other sites More sharing options...
-Welsh-Stealth- Posted September 7, 2011 Share Posted September 7, 2011 when i was fitting my NA-T with Dr_Jeckyll he mentioned something about the central vent on the bottom centre of the wastegate. i was going to put a screw in to close it up but was warned not to as it may cause boost spiking problems... best bet would be to drop him a pm, he knows his stuff Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 7, 2011 Share Posted September 7, 2011 This may help: Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 7, 2011 Author Share Posted September 7, 2011 Ok I'm just going to buy a new wastegate but a hks or A tial. But just before I do is there anything else I can check before I dismantle the kit? Here is a video of the erratic boost. Sorry for the bad quality. http://i206.photobucket.com/albums/bb161/jamielfoster86/c79e3c52.mp4 And here is some pics. The boost gauge is on the left Wastegate opened at 8.82psi Wastegate opened at 4.08psi Wastegate opened at 7.35psi And here at 6.21psi Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 7, 2011 Share Posted September 7, 2011 Tial wastegates are pretty good in the budget range stuff. HKS are pretty dire. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 7, 2011 Author Share Posted September 7, 2011 when i was fitting my NA-T with Dr_Jeckyll he mentioned something about the central vent on the bottom centre of the wastegate. i was going to put a screw in to close it up but was warned not to as it may cause boost spiking problems... best bet would be to drop him a pm, he knows his stuff Yeah I took it out and it started opening but it's all over the place like one run it will open at 4psi and the next run 8psi and so but it is opening now! Thanks for your input mate Quote Link to comment Share on other sites More sharing options...
-Welsh-Stealth- Posted September 9, 2011 Share Posted September 9, 2011 hope you got it sorted for the map Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 10, 2011 Author Share Posted September 10, 2011 No I couldn't go as I couldn't work it out. I'm just going to have to replace the wastegate and hope that's all it was :-( Quote Link to comment Share on other sites More sharing options...
Nic Posted September 10, 2011 Share Posted September 10, 2011 No I couldn't go as I couldn't work it out. I'm just going to have to replace the wastegate and hope that's all it was :-( You could try testing it first. 6TlcIe0BRVY Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 10, 2011 Author Share Posted September 10, 2011 You could try testing it first. 6TlcIe0BRVY Yeah mate that was the first thing I done. I took the dump tube off and used a compressor and it seemed to open freely. Then I also started the car up and used the compressor so I could here it open. But when I take it on the road it opens at all different psi levels witch are mostly higher than the spring rating! As it should open at 5psi but it seems to mostly open at around 7-8psi. I havnt a clue what could be causing it to do this? As all vacume pipes have now been replaced? I've also tried taking the vacuume from the inlet manifold side but still won't open. Could the spring be causeing problems as it was just a £15.00 eBay job. Or could there be small holes or rips in the diaphragm? Or could a boost leak cause a problem like this? I don't think I have a boost leak as it goes stright up to 9psi and pulls strong. Quote Link to comment Share on other sites More sharing options...
Scott Posted September 10, 2011 Share Posted September 10, 2011 When you were testing it, were you testing it with 5psi or were you just firing compressed air into it? If you were testing it with a true 5psi and it was consistently opening then that would point towards a boost gauge fault to me. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 10, 2011 Author Share Posted September 10, 2011 When you were testing it, were you testing it with 5psi or were you just firing compressed air into it? If you were testing it with a true 5psi and it was consistently opening then that would point towards a boost gauge fault to me. just compressed air mate. i think the only thing left to do it take it off and check it over. i just hope it is fooked as i hate fault finding as im no good at it lol ;-) it is quite new but then again its xs-power lol Quote Link to comment Share on other sites More sharing options...
Scott Posted September 10, 2011 Share Posted September 10, 2011 just compressed air mate. i think the only thing left to do it take it off and check it over. i just hope it is fooked as i hate fault finding as im no good at it lol ;-) it is quite new but then again its xs-power lol Chances are the wastegate is fooked then bud. If it's opening at 8psi then it'll definitely open with compressed air as you will usually find 1-3bar (15-45psi) in a compressed air line. Kind of pointless doing that check to be honest. Best thing to do would be to get it checked over by someone with the facility to input and measure the pressure required to actuate it. If it's higher than the spring rating then the wastegate is fit for the bin. Unfortunately this happens a lot with anything XS related. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 10, 2011 Author Share Posted September 10, 2011 Chances are the wastegate is fooked then bud. If it's opening at 8psi then it'll definitely open with compressed air as you will usually find 1-3bar (15-45psi) in a compressed air line. Kind of pointless doing that check to be honest. Best thing to do would be to get it checked over by someone with the facility to input and measure the pressure required to actuate it. If it's higher than the spring rating then the wastegate is fit for the bin. Unfortunately this happens a lot with anything XS related. yeah i was warned about the kit before i bought it so its my own fault. if i know its the wastegate for certain i will be more than happy to buy an expencive wastegate and then start replacing all xs power junk with brand names and then hopfully my problems will reduce :-) Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 11, 2011 Author Share Posted September 11, 2011 Ok I took off the wategate today and checked it over and everything seemed to be looking ok and the piston was moving freely. I cleaned it up and regressed and it's still the same? Boost is all over the place? :-( All looks new! And a video link of it working! http://i206.photobucket.com/albums/bb161/jamielfoster86/08a0b35f.mp4 Now I'm really confused! It all seems to be brand new inside and working freely! Could it be something else? I've also replaced the vacuum hoses for the third time now! Please help guys! :-) Quote Link to comment Share on other sites More sharing options...
Scott Posted September 11, 2011 Share Posted September 11, 2011 Looks to be opening about 10lbs according to that gauge. They are notoriously inaccurate though. I would possibly suspect the spring if everything else is ok. The fact that you were getting intermittent results would say it's something else though. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted September 11, 2011 Author Share Posted September 11, 2011 Yeah well the spring was opening fine at a steady 5psi when first installed. But the wastegate did stick open after a few months of use and after taking the kit off and giving the wategate a clean it was closing ok. But I never tried to open it after that as I was waiting to get it mapped! But as the car was due to go down for mapping on Friday gone there. I thought I would make sure everything was working and this is what I came across! Boost all over the place. What else can cause this to happen? Cheers Quote Link to comment Share on other sites More sharing options...
Scott Posted September 11, 2011 Share Posted September 11, 2011 The wastegate is sticking bud, it's the only explanation really. Either that or the boost gauge is playing up. Quote Link to comment Share on other sites More sharing options...
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