welshbuddy Posted December 29, 2012 Share Posted December 29, 2012 hey guys as title, it drives fine, just when it gets to boost at about 4k, its like its struggling to breath! and just stops at 4ks and spits :s? all intercooler pipes are connected as checked. im thinking it could be the ( little black box on the bulk head which a vacum pipe connects to, as one is not connected?) or would that go to a boost controller now? +using alot of fuel!! much help appreciated. Quote Link to comment Share on other sites More sharing options...
listy Posted December 29, 2012 Share Posted December 29, 2012 The black box sounds like a BC solenoid from what you've said. Not sure if it would make a difference, but I'm sure it replaces part of the "boost circuit" so may cause problems if it is disconnected. My TT was doing this a while back. Never got to the bottom of it though, and it sorted itself. Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted December 29, 2012 Author Share Posted December 29, 2012 was it something easy like a boost pipe? hope mine is .. Quote Link to comment Share on other sites More sharing options...
listy Posted December 29, 2012 Share Posted December 29, 2012 I literally couldn't find anything wrong mate. May have been an ill fitted boost pipe as I did remove them all to check for splits, but couldn't say for sure. Quote Link to comment Share on other sites More sharing options...
listy Posted December 29, 2012 Share Posted December 29, 2012 I literally couldn't find anything wrong mate. May have been an ill fitted boost pipe as I did remove them all to check for splits, but couldn't say for sure. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted December 29, 2012 Share Posted December 29, 2012 The little black box on the bulk head will be for your map sensor, you need the stock one connected and the 3 bar map sensor from your emanage T'ed into it! If that's set up correct then change your coil as it sounds the same as the problem I had. If you drive slow can you take it to the limiter, but when you floor it its like hitting a rev limiter at 4k rpm? Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 29, 2012 Share Posted December 29, 2012 I have a Single still using stock map sensor but I my piggy has one built in , but this could well be you issue Q has it ever run as a single Q do you have correct ecu Q is it mapped Q what plugs are you running Q what condition are you coil pack clips Quote Link to comment Share on other sites More sharing options...
neilthenut Posted December 29, 2012 Share Posted December 29, 2012 fuel cut ? what boost ya running now shag? maxing them injectors still? Quote Link to comment Share on other sites More sharing options...
Pig Posted December 29, 2012 Share Posted December 29, 2012 Coil packs? Fuel pressure issue? Need a better description of the symptoms but my money is on fuel from what you have said. Running twin pumps? Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted December 31, 2012 Author Share Posted December 31, 2012 The little black box on the bulk head will be for your map sensor, you need the stock one connected and the 3 bar map sensor from your emanage T'ed into it! If that's set up correct then change your coil as it sounds the same as the problem I had. If you drive slow can you take it to the limiter, but when you floor it its like hitting a rev limiter at 4k rpm? yehp exactly what you just said ! im going to go out now, look for the pipe that plugs into the bar map sensor, as there is a port under neath with nothing going into it :S? might of just popped off. - - - Updated - - - fuel cut ? what boost ya running now shag? maxing them injectors still? im still only running 38% boost :S lol, i need a FCD so i can crank it to 90+ lol then were talking . Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted December 31, 2012 Author Share Posted December 31, 2012 Coil packs? Fuel pressure issue? Need a better description of the symptoms but my money is on fuel from what you have said. Running twin pumps? im running a single walbro 255/ph, im sure its something to do with the bar map sensor! :S its been running single for a while, the stock Ecu runs a single as its a 1jz not a 2jz Quote Link to comment Share on other sites More sharing options...
FOSTA Posted December 31, 2012 Share Posted December 31, 2012 Yep you will definitely need your stock map sensor connected, yeah that's correct the plastic nipple on the under side needs to have a vacume line run to it. Once you reconnect just stick a cable tie on there to stop it poping back off Quote Link to comment Share on other sites More sharing options...
Kaan W Posted December 31, 2012 Share Posted December 31, 2012 Yep you will definitely need your stock map sensor connected, yeah that's correct the plastic nipple on the under side needs to have a vacume line run to it. Once you reconnect just stick a cable tie on there to stop it poping back off Is this little black box the thing with a wire coming from it and has 2 vacuum lines attatched? Mines near my alternator just hanging loose by the vaccum lines.. Should this be screwed down somewhere? Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 31, 2012 Share Posted December 31, 2012 Is this little black box the thing with a wire coming from it and has 2 vacuum lines attatched? Mines near my alternator just hanging loose by the vaccum lines.. Should this be screwed down somewhere? That sounds like one of the old vsv from the sequential system mate Quote Link to comment Share on other sites More sharing options...
Kaan W Posted December 31, 2012 Share Posted December 31, 2012 (edited) That sounds like one of the old vsv from the sequential system mate Im not sure it could be aftermarket as its still connected to the vacuum lines from the wastegates on my single. Just didnt know what it was for or whether its been changed hence why its in a wierd place. Edited December 31, 2012 by Kaan W (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 31, 2012 Share Posted December 31, 2012 What's the ecu? Can you post a log file? Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 31, 2012 Share Posted December 31, 2012 Im not sure it could be aftermarket as its still connected to the vacuum lines from the wastegates on my single. Just didnt know what it was for or whether its been changed hence why its in a wierd place. [ATTACH=CONFIG]162391[/ATTACH] I can't see the picture but that would be your boost control solenoid, bleeds air out so the waste gate has less pressure to open giving you more boost Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 31, 2012 Share Posted December 31, 2012 What's the ecu? Can you post a log file? From what I have 4read Chris he is on a stock ecu as he has a 1jz engine and loom Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted January 13, 2013 Author Share Posted January 13, 2013 hey guys, sorry didnt keep you up to date with this. i looked around the throttle body, found a vacuum pipe that didn't connect to anything, looked at the bar map sensor, hey presto it popped off! hahah sorted it with a cable tie .. problem fininished. x Quote Link to comment Share on other sites More sharing options...
little num Posted January 13, 2013 Share Posted January 13, 2013 I missed my map sensor off when refitting the engine (by mistake) and i couldnt even get the car to start never mind run. What sort of power you running on stock ECU then and what injectors you fitted. Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted January 13, 2013 Author Share Posted January 13, 2013 hey mate, im not sure what power it would be ... injectors are still the standard ones out the soarer, going to get bigger soon. ill crank the boost up when i get a fcd and ill find out about maxxing, i will later on get a standalone though. after respray and such . Quote Link to comment Share on other sites More sharing options...
little num Posted January 13, 2013 Share Posted January 13, 2013 Dont up the boost until you get bigger injectors mate. Ive got 2JZ 440 injectors fitted with a fuel pressure regulator on the return to hold extra fuel in the rail. Have you got rid of the fuel pulsating dampner also that bolts to the block if NO then do so as thats a real hold up for the fuel. Also what pump you got ??? Im just over 450hp and still on stock ECU with 440cc injectors, it runs great at 1.35 bar if i push more then 1.45 then i get det and the ECU kills the power instantly. Im going to get a syvecs in the very near future so will be looking for 550hp with 800cc injectors fitted. Quote Link to comment Share on other sites More sharing options...
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