Bob Posted September 10, 2006 Share Posted September 10, 2006 Got the new exhaust fitted today, and loved it to bits. The car felt a hell of a lot more responsive and pulled quite a bit harder too - all in all happy days. That was until this afternoon when, giving it some beans of a roundabout, there was a faint fluttery / tinkley sound and no boost at all after 4k - the boost gausge just sits at 0. Whenever the engine hits 4k revs or there-abouts, there's a faint fluttery sound and a complete drop off in all boost, but no smoke. The first turbo still boosts but seems to be struggling a bit, coming in later and not generating boost as quick. The engine is completely stock, standard airbox though god only knows what the previous owner did with it - previously had a Blitz SUS kit on. I've had a quick look at the EGCV VSV and actuator but all the hoses seem okay, as do the hoses throughout the engine bay. The bay is still too warm to be prodding around in right now! So please help guys, you all have much more technical knowledge about Supras than me. I hope the turbo hasn't died, otherwise she'll have to be SORNd til after xmas, as we're still saving for our December honeymoon :edit: thought I'd change the thread title Link to comment Share on other sites More sharing options...
bignum Posted September 10, 2006 Share Posted September 10, 2006 Dont panic just yet, im sure zed, a member on here had this happen and it turned out to be the egb, flap, which is controlled by an actuator, try a search on this just to check. Link to comment Share on other sites More sharing options...
Pig Posted September 10, 2006 Share Posted September 10, 2006 I have 3 uk turbos sat in the garage, dont worry yourself too much! Link to comment Share on other sites More sharing options...
bignum Posted September 10, 2006 Share Posted September 10, 2006 I have 3 uk turbos sat in the garage, dont worry yourself too much! dont take any notice of bobs bonet vent pig i think he is j spec. Link to comment Share on other sites More sharing options...
Mike M Posted September 10, 2006 Share Posted September 10, 2006 Try the TTC mod which will allow both tubbies to run in parallel and spool around the same time. http://mkiv.supras.org.nz/articles/andy.htm If both spool up around 3500 rpm and pull as normal at 4k + then both are working and its a much nicer control valve / vsv problem. Link to comment Share on other sites More sharing options...
Bob Posted September 10, 2006 Author Share Posted September 10, 2006 dont take any notice of bobs bonet vent pig i think he is j spec. Yep, J-spec. Unfortunately the previous owner put the bonnet vent on. There's no hole either, but I can't take it off cos he used what seems like superglue Thanks for the comments guys, I'll go search for the ebv doodah Link to comment Share on other sites More sharing options...
letmeshowyou Posted September 11, 2006 Share Posted September 11, 2006 are you absolutely sure you havent popped an intercooler pipe off? It sounds far more likely from your description! Try the one that disappears by the rad on the passenger side... Link to comment Share on other sites More sharing options...
Bob Posted September 11, 2006 Author Share Posted September 11, 2006 WOuld't have thought so, as the first turbo is still boosting - just not as easily as before. I'm going to take a good look this evening, take out the air box etc.; zed's thread from earlier (I found it! ) seems very similar to mine, so I'll try there first. Link to comment Share on other sites More sharing options...
Ian C Posted September 11, 2006 Share Posted September 11, 2006 Definitely sounds like a sequential plumbing system. I'd suggest checking the EGCV again -Ian Link to comment Share on other sites More sharing options...
Mcgoo Posted September 11, 2006 Share Posted September 11, 2006 I really hope its a plumbing problem mate. However, the tinkley sound you describe reminded me of my ceramic blades going down my exhaust . Good luck, hope its nothing serious. Link to comment Share on other sites More sharing options...
Soonto_HAS_soop Posted September 11, 2006 Share Posted September 11, 2006 I've got a JSpec second turbo, also lying on my garage floor, spare at the moment, if you want it make me an offer... Link to comment Share on other sites More sharing options...
Bob Posted September 11, 2006 Author Share Posted September 11, 2006 I really hope its a plumbing problem mate. However, the tinkley sound you describe reminded me of my ceramic blades going down my exhaust . Good luck, hope its nothing serious. The thing that worries me is that the 1stcat is still in - but nothing seems to be overheating at least. I've got a JSpec second turbo, also lying on my garage floor, spare at the moment, if you want it make me an offer... Cheers mate, I'll bear you in mind Link to comment Share on other sites More sharing options...
Bob Posted September 12, 2006 Author Share Posted September 12, 2006 Small update! The Wastegate VSV and EGCV VSV are out and sitting in front of me, and I'm gonna check them in accordance with the manual once I figure out where I put it . . . The EGCV actuator looks fine and still moves smoothly. I have replaced the rubber hoses to the wastegate and EGCV actuators and the surrounding vacuum hoses, as they had gone brittle and cracked at the ends. Link to comment Share on other sites More sharing options...
Bob Posted September 12, 2006 Author Share Posted September 12, 2006 THE EGCV VSV is showing a resistance across the pins of 41.6 Ohms, there's no grounding to the body, and it's switching properly with no leakage. So it's not that. Link to comment Share on other sites More sharing options...
Bob Posted September 12, 2006 Author Share Posted September 12, 2006 The wastegate VSV seems like it's dodgy. Variable resistance ranging from 196 to 1k ohms (even after pins had been cleaned and filed), no ground to the body, and leaking between ports. However, when I blew through it and switched the 12v across it, it switched perfectly. Taking th ereadings again, there was no leakage and resistance was down to 24 Ohms - loose connection possibly? Too much crap inside? :edit: Holy shite! The wastegate VSV is £220 from Toyota! Link to comment Share on other sites More sharing options...
Bob Posted September 12, 2006 Author Share Posted September 12, 2006 EGBV VSV checked and cleaned and EGBV pipes all OK. Reinstalled VSVs with new pipes where necessary and took her out for a spin. Still fubar'd. I checked readings mre carefully, and I'm getting 0.5bar boost from turbo 1, but not til around 3200 revs. When turbo 2 should come online, boost drops - but seems to be present at roughly 0.1bar?! The auto box also seems to playing silly-buggers now; it's not changing down or up where normally it would. Still no smoke, but some fluttery sounds still audible. HELP!!! Link to comment Share on other sites More sharing options...
wkdtime Posted September 12, 2006 Share Posted September 12, 2006 I would have tried TTC as a first course of action to illiminate the IACV's, would have taken 10 mins to set up. Link to comment Share on other sites More sharing options...
Lucifer Posted September 12, 2006 Share Posted September 12, 2006 I have one if you need one Bob Link to comment Share on other sites More sharing options...
Bob Posted September 13, 2006 Author Share Posted September 13, 2006 All actuators working fine, all VSVs and actuator valves working fine. Also checked the 2nd turbo to see if the exhaust housing was cracked. Tried to get the intake section off #2 but the bolts ain't coming off without a bit of help, and that help can't fit in that small space! (many thanks to Greg @ Turbofit for talking me through it today!) Guess I've got to bite the bullet and get some quotes for fitting the 2nd turbo - I just haven't got time myself, as well as a having a crappy gravel drive and even crappier jack Link to comment Share on other sites More sharing options...
Suprasteve Posted September 13, 2006 Share Posted September 13, 2006 bob, By the sounds of it you know your way around the engine far more than me but I feel its worth mentioning this... I had a similar problem when i first got mine i.e. the 2nd turbo wasn't doing much. It turned out to be a small hose that popped off around the back (between the block and dash but to the right a bit). it was only a small hose and very tight and dark round the back but once connected again it totally fixed the problem and 2nd turbo worked again. hope its that simple for you. I'm sure you've already looked at this and sorry for not being very technical. Link to comment Share on other sites More sharing options...
Bob Posted September 13, 2006 Author Share Posted September 13, 2006 Cheers Steve! I'm still only finding my way around the engine bay tbh, just been reading up with some of the technical articles from here and mkiv.com! Cheers for that though mate, I'll go have a quick look now! Link to comment Share on other sites More sharing options...
bignum Posted September 14, 2006 Share Posted September 14, 2006 Bob have you tried ttc yet? Link to comment Share on other sites More sharing options...
Mike M Posted September 15, 2006 Share Posted September 15, 2006 What? 220 quid for a VSV, feck I need two. My EGBV vsv was the same when checking continuity, all over the shop but worked with 12v but I still think it's enough to stop it working properly as it gets a pulsed output from the ECU which wont like dodgy connections. I believe the wastgate vsv gets a pulsed output too allowing it to open progressively. Link to comment Share on other sites More sharing options...
Bob Posted September 15, 2006 Author Share Posted September 15, 2006 Bob have you tried ttc yet? I stripped off most of the turbo pipework to try and get a good look at EGBV setup the other night - Gonna put it all back together and try TTC but I'm not holding my breath tbh. Link to comment Share on other sites More sharing options...
Steviekid Posted September 15, 2006 Share Posted September 15, 2006 Gonna put it all back together and try TTC but I'm not holding my breath tbh. Try it in mechanical TTC by wrapping wire around the IACV and EGCV linkages and blocking off the boost feed to the pressure tank and see what boost you get. If it's still not working then remove the boost feed to the wastegate VSV and block it off, then drive the car (very carefully) and check your boost. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now