Notts_TT Posted March 11, 2012 Share Posted March 11, 2012 Hi I've just done a full bpu on my supra and when second turbo comes online it misfires/backfires and loses power. Any ideas lads... Dan Link to comment Share on other sites More sharing options...
dude Posted March 11, 2012 Share Posted March 11, 2012 Coil packs/clips or plugs dude Link to comment Share on other sites More sharing options...
tony tt Posted March 11, 2012 Share Posted March 11, 2012 Coil pack connection? Did you change the plugs today? Link to comment Share on other sites More sharing options...
safcdixon Posted March 11, 2012 Share Posted March 11, 2012 Did you put higher rated Plugs in? or possible fuel cut , (EDIT BEATEN TOO IT) Link to comment Share on other sites More sharing options...
tony tt Posted March 11, 2012 Share Posted March 11, 2012 Pipped at the post by sir dude! Damn. Link to comment Share on other sites More sharing options...
sideexitsupra Posted March 11, 2012 Share Posted March 11, 2012 Have you got a fuel cut defender installed. Not sure of the exact number but the ECU will cut the fuel over 1.0 (?) bar. If you have it could be down to coil packs or clips What boost are you hitting? Edit Cricket, loads of people jumped on this at the same time! Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 I put new plugs in the other day, the coil connectors fit snugly onto the coil packs but clips have broken? Oh forgot to mention afr is all over, one drive will show 14 wot and another 10 to 11... Annoying ! Dan Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 Hitting 1.2 bar, unstable... And I have a hks fcd on setting 12 ? Thanks Link to comment Share on other sites More sharing options...
tony tt Posted March 11, 2012 Share Posted March 11, 2012 Hitting 1.2 bar, unstable... And I have a hks fcd on setting 12 ? Thanks Is it not 9 on the fcd? Or 6 cant remember Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 What do these numbers mean and would setting 12 cause problems... What do you think about the afr readings. Thanks Link to comment Share on other sites More sharing options...
dude Posted March 11, 2012 Share Posted March 11, 2012 How are you measuring AFR ???? Link to comment Share on other sites More sharing options...
tony tt Posted March 11, 2012 Share Posted March 11, 2012 What do these numbers mean and would setting 12 cause problems... What do you think about the afr readings. Thanks At wot i would expect to see afr around 11 and on idle or cruising between 14 and 15 mate. Link to comment Share on other sites More sharing options...
ashbuster Posted March 11, 2012 Share Posted March 11, 2012 i have mine on 9 and its fine Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 I've just read setting 12 on fcd is cars standard setting. I'll turn it to 9 tomorrow and run it again :-) Could a slight boost leak or something mess up afr readings ? Thanks Link to comment Share on other sites More sharing options...
safcdixon Posted March 11, 2012 Share Posted March 11, 2012 I've just read setting 12 on fcd is cars standard setting. I'll turn it to 9 tomorrow and run it again :-) Could a slight boost leak or something mess up afr readings ? Thanks If you had it on the stock setting it was probobly hitting the fuel cut dude Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 How are you measuring AFR ???? ??? Not sure dude, but if I reset ecu and drive like miss daisy it runs at correct readings, as soon as I boot it once, it runs mega rich all the time ? Link to comment Share on other sites More sharing options...
dude Posted March 11, 2012 Share Posted March 11, 2012 ??? Not sure dude, but if I reset ecu and drive like miss daisy it runs at correct readings, as soon as I boot it once, it runs mega rich all the time ? How have you got your figures dude that you quoted ???? Try the fcd but it always worth a power run to see how shes running Link to comment Share on other sites More sharing options...
Rob W Posted March 11, 2012 Share Posted March 11, 2012 I think John means is what are you getting the readings from e.g AEM AFR gauge? Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 Sorry, a AEM afr gauge... It runs all over, like I said if I reset ecu and drive super steady not hitting 2nd turbo it will idle at 14+ and cruise at 14 + but as soon as I boot it she idles at 11ish and cruises at 11ish... Its driving me mad too... Thanks Link to comment Share on other sites More sharing options...
Guest Budz86 Posted March 11, 2012 Share Posted March 11, 2012 One of the VSV's stuck open? Guessing here but I've got a problem with an intermittent 2nd turbo and pretty sure that's what's causing it, not sure if that would cause funny AFR readings though? Link to comment Share on other sites More sharing options...
dude Posted March 11, 2012 Share Posted March 11, 2012 How old is the sensor dude ??? They dont last forever, when you get the popping sorted you should book a power run on a dyno like I said before, they willuse a much better / faster wideband sensor than the AEM one which is TBH pretty crap !"!!! Link to comment Share on other sites More sharing options...
Notts_TT Posted March 11, 2012 Author Share Posted March 11, 2012 The gauge and sensor is new mate ? By the looks of things I'm hitting fuel cut with my fcd being set to 12, will set to 9 tomorrow and will let you guys know. Thanks Dan Link to comment Share on other sites More sharing options...
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