reeceu Posted August 17, 2013 Share Posted August 17, 2013 Right I am now out of ideas. Car was working fine, went to wire in a HKS FCD and since then these are the symptoms. Removed the FCD and still the same. Symptoms are 2nd turbo will not come online, I have a constant engine light on and have very rough idle. Have code 31 stored. Any bright ideas would be much appreciated!! Quote Link to comment Share on other sites More sharing options...
Littler Posted August 17, 2013 Share Posted August 17, 2013 (edited) Error code 31 is the map sensor iirc which is the wire you mess with to fit the FCD (again assuming I have my knowledge right), so double check the wiring is ok and then reset the ecu for it to relearn and take it from there Here you go: Edited August 17, 2013 by Littler (see edit history) Quote Link to comment Share on other sites More sharing options...
HadeS Posted August 17, 2013 Share Posted August 17, 2013 I had same issue before. Ended up with map sensor replacement. Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 17, 2013 Share Posted August 17, 2013 Sounds like you've cocked the MAP sensor wiring with the FCD work, start there Quote Link to comment Share on other sites More sharing options...
reeceu Posted August 17, 2013 Author Share Posted August 17, 2013 Cheers for the reply guys. To sound naive where is the best place to start to diagnose/ replace the map sensor?? Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 18, 2013 Share Posted August 18, 2013 I don't think there is anything wrong with the sensor. Put it like this: 1) it worked fine 2) you cut the wire between the MAP sensor and the ECU 3) it went wrong It's not too hard to see where the fault probably lies Re-investigate the cut you map in the MAP wire and all your answers should be there. Quote Link to comment Share on other sites More sharing options...
reeceu Posted August 20, 2013 Author Share Posted August 20, 2013 right well after some poking, fiddling, soldering and checking managed to get the car running properly again with no CEL. if was def related to the map sensor wiring i had played around with so many thanks for the advice gents. my only issue is now i have no second turbo coming in at 4k, could this still be the map sensor struggling or could it be a vsv issue?? Quote Link to comment Share on other sites More sharing options...
mellonman Posted August 20, 2013 Share Posted August 20, 2013 thats would be the vsv at the top back with a vac going to the actuator of the second turbo Quote Link to comment Share on other sites More sharing options...
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