Pedroby Posted April 17, 2013 Share Posted April 17, 2013 Almost finished with a swap from GE --> GTE J-spec engine. But the engine is not running proper, lots of black smoke and ' waving' in RPM like it's running in a safe mode or something. Already did the diagnose trick and there are no fault codes. I am almost sure it must be a vacuum issue on the intake manifold. From the stock FPR one vacuum line goes in bypass with 2 lines to 1: Map sensor (yellow arrow on picture) and 2: to the vacuum ' bolt' with the black plastic bulby looking connection next to the map sensor (red arrow in picture). PLEASE correct me if this is wrong!! Then the 3th vacuum line (purplish blue arrow, left on the picture) Can anybody tell me where this one goes to? Or maybe a vacuum diagram, or even better some pictures of your block how it should be. Need help big time!! As the car is finally ready to roll, but with the black smoke out of it....it don't feel good to bring her home. Any other suggestions are more than welcome! (BTW I took this pic of the net, so it's not my car). Quote Link to comment Share on other sites More sharing options...
kaahari Posted April 17, 2013 Share Posted April 17, 2013 (edited) Red and yellow are correct. 3.rd vacuum line is connected to fuel vapor circulate system (etc), i have blocked it with no problems (also removed whole system). I got quite same symptoms when my MAP vacuum pipe was loose, i didnt see it first because pipe connector is under map sensor. Idle hunting 300-800rpm and no power on boost... Edited April 18, 2013 by kaahari (see edit history) Quote Link to comment Share on other sites More sharing options...
Pedroby Posted April 17, 2013 Author Share Posted April 17, 2013 Thanks Kaahari for the reply. You mean the EGR system? I have no EGR on my J-spec. Might be different then where the vacuum line need to lead to. Anybody?? How hard can it be to take a picture of you engine bay detailed on this part Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 17, 2013 Share Posted April 17, 2013 Anybody?? How hard can it be to take a picture of you engine bay detailed on this part As hard as it is to search http://www.mkivsupra.net/vbb/showthread.php?35925-Engine-component-locations http://www.mkivsupra.net/vbb/attachment.php?attachmentid=13939&d=1112558977 Quote Link to comment Share on other sites More sharing options...
kaahari Posted April 18, 2013 Share Posted April 18, 2013 (edited) 3rd line jspec: fuel vapor "box" vacuum line. That black can near firewall. Remove?& block Notice that theres vacuum lines on other side of manifold also, more fuel vspor system pipes and vacuum line to power steering etc if i remember correctly. Check those also Broblem is identical when my map sensor didnt get vacuum. Have you used supra wiring harness? Are you absolute sure map signal goes to right pins on ecu? My friend had mixed two sensors when making engine conversion, no error codes because ecu got voltage... Edited April 18, 2013 by kaahari (see edit history) Quote Link to comment Share on other sites More sharing options...
Pedroby Posted April 18, 2013 Author Share Posted April 18, 2013 I removed the canister already and will block the vacuum line then. Or maybe I can use this vacuum to connect to my Apexi BOV vacuum connection? I havent connected one of the PS vacuum lines as one of the plastic pins to put the line on on the pump ' connector' is broken, so only one is connected. But I almost can't believe this open vacuum at the trac. part of the intake will have such an influence on the engine the way it runs now. The engine is still black smoking and runs way to rich on the fuel. Quote Link to comment Share on other sites More sharing options...
kaahari Posted April 18, 2013 Share Posted April 18, 2013 Measure from map wire near ecu that ecu gets map voltage right. Should be constant when ignition on (atmospheric) and alter when engine running Quote Link to comment Share on other sites More sharing options...
Pedroby Posted April 18, 2013 Author Share Posted April 18, 2013 uhmm do you know which wire is the map wire near the ECU? Quote Link to comment Share on other sites More sharing options...
kaahari Posted April 18, 2013 Share Posted April 18, 2013 uhmm do you know which wire is the map wire near the ECU? Connector E9 Pin 62 http://www.mkivsupra.net/vbb/showthread.php?35919-ECU-Pinouts Quote Link to comment Share on other sites More sharing options...
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