Zed2k Posted April 18, 2008 Share Posted April 18, 2008 Hi I am trying to Tune my L28 Turbo motor it has MS1 V3extra+ edis all is great untill I hit 163kpa then it feels like the car cuts out AFR was 12.5-13 when wot and everything else looks good I was datalogging so looked at the sample and it shows 0Pulse width for a fraction of a second at 163kpa , throttle still open, 22degrees spark wideband shows 19:1 EEK!!. Before and after the event Pulse width was 11ms, seems like the injectors shut off??? Sure felt like it just like somone switched the ignition off and back on again. any ideas fuel pressure is 35psi running 550cc injectors. T04b vtrim turbo stage 5 wheel. I haad this on 2 dataloggs the only similar thing between the 2 is it happens at 163kpa different rpm. any ideas, 240sx TPS maybe? although this showed a good reading at this point? Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted April 18, 2008 Share Posted April 18, 2008 whats your battery voltage? sounds like your ecu reset Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 18, 2008 Author Share Posted April 18, 2008 Deos the resets show on the Datalogg, I'm a little new to this quick learner though!! may have a battery issue as am running an 12v-240v inverter to run the laptop. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted April 18, 2008 Share Posted April 18, 2008 in megalog viewer pull up your battery voltage in one of the graphs. if it drops below 9v ever its resetting Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 18, 2008 Author Share Posted April 18, 2008 Just checked it 12.6V running inverter ecu and headlamps so not that? maybe just a low map spot that needs tuning but I can't see why the PW would drop right out? Quote Link to comment Share on other sites More sharing options...
naviathan Posted April 18, 2008 Share Posted April 18, 2008 This thread gets my vote for longest run on sentence of the week....Wow... Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted April 18, 2008 Share Posted April 18, 2008 LOL i had to check to see if it was mine or not. I pretty bad at it. Im really trying to get better though. Quote Link to comment Share on other sites More sharing options...
datman Posted April 18, 2008 Share Posted April 18, 2008 sounds like your vr sensor is causing the spark to fail....unburnt fuel ups the O2 and shows as lean. That or your rev limit is set to low. lets see a log. Quote Link to comment Share on other sites More sharing options...
datman Posted April 18, 2008 Share Posted April 18, 2008 Apart from mine having a holset and 680cc injectors we the same spec. Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 19, 2008 Author Share Posted April 19, 2008 Remapped last night and cut still there, I will up load a Datalogg when I get back later, see what you think!!! Next thing to try is seeing if it will hit higher rpm's with the boost pipes open/ wastegate open. just to see if it's boost related. Quote Link to comment Share on other sites More sharing options...
datman Posted April 19, 2008 Share Posted April 19, 2008 Plug gap too big? worth a look maybe Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 19, 2008 Author Share Posted April 19, 2008 Not sure, but what plug gap are you running? kind of thinking it maybe interference may disconnect the alternator tommorow and see if that helps. Quote Link to comment Share on other sites More sharing options...
datman Posted April 19, 2008 Share Posted April 19, 2008 My pug gap is .030. Are you running the old style alternator with external regulator? noise should show up on the log if that's what it is. Email one over to me to look at. Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 19, 2008 Author Share Posted April 19, 2008 Here is the datalog and screen shots of the injector cut off looks like 163kpa is cut off point!! Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 19, 2008 Author Share Posted April 19, 2008 Datalogg won't upload think it's a bit big will up load a smaller log tomorow I'll also try it with no boost If ok may point to a fuel pressure problem? Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 19, 2008 Author Share Posted April 19, 2008 I think problem found Overboost set at 165kpa will check it out tommorow!!! head hurts less Now... Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted April 19, 2008 Share Posted April 19, 2008 that might do it.. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted April 21, 2008 Share Posted April 21, 2008 lol oops! Quote Link to comment Share on other sites More sharing options...
Zed2k Posted April 22, 2008 Author Share Posted April 22, 2008 Yes I was a bit paranoid at over boosting when I first installed the ecu but have got over it now, happy days!!! Quote Link to comment Share on other sites More sharing options...
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