TubbyTwo Posted October 14, 2012 Share Posted October 14, 2012 (edited) Hi folks, Having issues with the 1st turbo not making much boost or giving its usual little kick. Can still hear the turbo spooling, but the engine note sounds louder like the car is in TTC mode, lost some low down torque. It almost feels like its bogging down under boost on the 1st turbo, registers about 0.55 bar on the guage, until changeover then its back to normal and will rocket to 1.2 bar and hold it nice and strong. have read Ian's post: http://www.mkivsupra.net/vbb/showthread.php?35926-The-sequential-system any suggestions? split hose? Currently have some new vac hoses on order, but have a feeling its something more serious? Any help would be great. Si. Edited February 17, 2013 by TubbyTwo (see edit history) Quote Link to comment Share on other sites More sharing options...
Gpro Posted October 14, 2012 Share Posted October 14, 2012 Can you see if the exhaust actuator rod is stuck open? or slightly open? i forgot the name for the actual part (It sits under the first turbo) Quote Link to comment Share on other sites More sharing options...
Gpro Posted October 14, 2012 Share Posted October 14, 2012 got it check the egcv actuator Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 14, 2012 Author Share Posted October 14, 2012 Will have a look late, looks a bit on the tight side! Quote Link to comment Share on other sites More sharing options...
sideexitsupra Posted October 14, 2012 Share Posted October 14, 2012 Guess its time to check all the vac hoses too. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 15, 2012 Author Share Posted October 15, 2012 Had a quick look last night and couldnt see any split hoses or problems that were obvious. I have however ordered a load of silicone vac hose to replace everything. Got to be a split somewhere. Quote Link to comment Share on other sites More sharing options...
sideexitsupra Posted October 15, 2012 Share Posted October 15, 2012 Make sure they are all pushed on tight. I had a second turbo issue earlier this year and the pipe was not off, just loose. It had moved a few mm and was obviously sucking in air. Pushing it back down solved the problem for a few days, replacing the pipe solved it for good! Quote Link to comment Share on other sites More sharing options...
tomgeer Posted October 15, 2012 Share Posted October 15, 2012 Do you have a boost controller fitted? Have you checked the VSV's are all working okay? Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 16, 2012 Share Posted October 16, 2012 Had a quick look last night and couldnt see any split hoses or problems that were obvious. I have however ordered a load of silicone vac hose to replace everything. Got to be a split somewhere. I used a lot of the silicone type hose in the past and it worked just fine everywhere except the EGCV. There isn't a bead on the end of the actuator's barb and the hose blows off easily, be aware Sounds like you've venting boost off the first turbo. If it clears up when #2 comes online it could be the reed valve in the ICV failing or the flap sticking open, bleeding boost back through #2 and out to atmo/back into #1. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 16, 2012 Author Share Posted October 16, 2012 Ok thanks guys. I had problems with loss of 2nd turbo start of the year that was a split hose, so they were replaced with silicone ones, all hoses replaced were secured with small cable ties. However this weekend I will recheck all hoses, for splits etc. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 16, 2012 Author Share Posted October 16, 2012 Do you have a boost controller fitted? Have you checked the VSV's are all working okay? Yes, but this has had all the hoses check, and tightened, and the controller has been reset and setup again twice so isnt a problem. have also tried removing it and problem is still there on stock boost. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 16, 2012 Author Share Posted October 16, 2012 I used a lot of the silicone type hose in the past and it worked just fine everywhere except the EGCV. There isn't a bead on the end of the actuator's barb and the hose blows off easily, be aware Sounds like you've venting boost off the first turbo. If it clears up when #2 comes online it could be the reed valve in the ICV failing or the flap sticking open, bleeding boost back through #2 and out to atmo/back into #1. Hi Ian, by ICV do you mean the Intake Air Control Valve (IACV) ? Quote Link to comment Share on other sites More sharing options...
andz222 Posted October 18, 2012 Share Posted October 18, 2012 has it been solved Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 18, 2012 Author Share Posted October 18, 2012 Not yet, new hoses arrived today so will be looking over the weekend. Quote Link to comment Share on other sites More sharing options...
andz222 Posted October 18, 2012 Share Posted October 18, 2012 ok Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 18, 2012 Author Share Posted October 18, 2012 You having the same issues? Quote Link to comment Share on other sites More sharing options...
andz222 Posted October 18, 2012 Share Posted October 18, 2012 no:) Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted October 18, 2012 Share Posted October 18, 2012 Have you tried the pressure tank? But mind you if the 1st turbo is spinning it means there's pressure in the tank. Its so annoying because there's a few things it could be. And for once My dad has experianced this so I might know a thing or two But we was unlucky because we later found out that the turbos had given up the ghost Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 19, 2012 Author Share Posted October 19, 2012 Im going to have a serious poke around at the weekend, i have a few parts to fit anyway. Convinced now its a vac issue somewhere as it pulls seriously hard after testing last night and hits full boost everytime. going to replace ALL vac lines and see where we go from there. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 21, 2012 Author Share Posted October 21, 2012 (edited) Right, replaced all the vacuum hoses I could see. Car is alot better but still not 100%. Some of the original hoses were rock solid and the installation of the hoses to the boost solinoid by previous owner was interesting. One of the electronic valves was missing a hose, im not sure if this should be blanked off or left open? This is the one at the front of the engine under water elbow/above alternator Aside from the ones changed are there any other hoses that are worth looking at? Thanks. Edited October 21, 2012 by TubbyTwo (see edit history) Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 22, 2012 Author Share Posted October 22, 2012 Gave the car a proper test on the way to work this morning, its certainly more sharp on the throttle. I have noticed now that the idle sits slightly higher, when waiting at lights/junction the car would idle at 900rpm in D. Now it sits at 1100, nothing has been touched to do with throttle cable etc. Could this indicate a leak somewhere? Only Vac lines that have not been replaced are circled in yellow in this picture: Im going to check that my BOV is also plumbed in correctly, as looking at the picture above compared to mine, The SSQV is connected differently. Any suggestions would be great. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 22, 2012 Author Share Posted October 22, 2012 Also, from reading another post on the HKS EVC 6 install, Mine looks different: From here: http://www.mkivsupra.net/vbb/showthread.php?257156-HKS-EVC-6-install-help His VSV looks like this: Mine looks like this: should both of the ports on the VSV be blocked off? Quote Link to comment Share on other sites More sharing options...
listy Posted October 22, 2012 Share Posted October 22, 2012 His looks like a EBC set up. Not sure if EVC set ups are the same, but with an EBC both pipes get capped iirc. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted October 22, 2012 Author Share Posted October 22, 2012 We have the same controller bud, HKS EVC 6. Installed by last owner. Quote Link to comment Share on other sites More sharing options...
listy Posted October 22, 2012 Share Posted October 22, 2012 (edited) In that case not sure dude. His photo is the same as a EBC solenoid gets plumbed in though by the looks of things. I'm guessing you pulled the pics from samurai 20v's thread? If Scott M said his is right, I'd go with that, he knows his shizzle. Edited October 22, 2012 by listy (see edit history) Quote Link to comment Share on other sites More sharing options...
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