Kristian G Posted February 26, 2015 Report Share Posted February 26, 2015 Independent of MAP and TPS value the car will lean out around 3300rpm, Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted February 26, 2015 Report Share Posted February 26, 2015 Hi Kristian, can you please do another log of the issue happening, use PC logging at 40 Hz , and LOG ALL PARAMETERS and repost, I don't have all the parameters I wish to look at in the RAR log file you have loaded. Can you also supply the PCL file. Regards Dave. Quote Link to comment Share on other sites More sharing options...
Kristian G Posted February 26, 2015 Author Report Share Posted February 26, 2015 The pcl file is there, look just above the picture. I'll have to take a full log tomorrow, didn't get to much time to look into this car/issue before I had to shut down for the day so I just posted my last log I had on the computer. Quote Link to comment Share on other sites More sharing options...
Steve Posted February 27, 2015 Report Share Posted February 27, 2015 Im with D here. Need more logged parameters. Nothing to pick up on so far. Only thing i can see from a quick overview is that AIT fuel correction isnt enabled. I take it there is no VTC on this car? Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted February 27, 2015 Report Share Posted February 27, 2015 Hi , Sorry, I missed the PCL file, distracted by the pretty pictures (log), ha ha. Regards Dave. Quote Link to comment Share on other sites More sharing options...
Kristian G Posted February 27, 2015 Author Report Share Posted February 27, 2015 Got to do a little more testing today, before the wastegate failed, blown membrane and stuck position. Please see the attached new log and PCL file. Quote Link to comment Share on other sites More sharing options...
Steve Posted February 27, 2015 Report Share Posted February 27, 2015 Weird. You should check timing through a run yes. Dont nessesarily think it got something to do with the problem , but i suspect you got some timing scatter happening there. Dont see VTC settings in the PCL, nor any AIT correction settings. Maybe im looking at a different version of teh program? 4.10? Well the fuel IS being dumped in there, the burn IS happening (no stumbeling), it IS going lean, and timing is ok (maybe!). How much extra fuel would you need to dump in to actually correct the reading? Could it be som e sort of charge reversion at just this point? Do you feel anything in the car att all? How big is that HP and TQ gain really? What kind of knock detection do you have on it? Looking closely (got the log on my 55" screen) i see a dip in the dRPM rate at the area of this happening... Im thinking you really should check that timing now and make sure its stable. Quote Link to comment Share on other sites More sharing options...
Kristian G Posted February 27, 2015 Author Report Share Posted February 27, 2015 I'm thinking either manifold air flow oscillation or fuel pressure oscillation. no fuel damper installed. Only FPR, it could be an issue.. but difficult to identify. I'll do a proper full check towards ignition. On the torque gain its difficult to say, not a lot, but it does increase, Quote Link to comment Share on other sites More sharing options...
Kristian G Posted February 27, 2015 Author Report Share Posted February 27, 2015 Yeah, I both feel and hear that lean out in the engine as I'm operating it on the dyno. Knock block in use. I've also cut 3-4dg of on ign from my pretuned map that I started this job with to start safe. Quote Link to comment Share on other sites More sharing options...
Steve Posted February 28, 2015 Report Share Posted February 28, 2015 Yeah charge reversion might be the case. The fuel is being dumped in there so it has to go somwhere. But then again. If it goes back into the intake again the charge should go even richer on the next cycle. Or at least there should be a rich dip AFTER the problemarea when the fuel goes where it should. ( Im just speculating here as i have never had such a problem to handle myself. So just thinking out loud) As it doesnt then maybe it actually gets blown out the exhaust because of to much overlap (?). Got access to a gas analyser? Could pick up a possibly high HC count. Really waiting for Dave to chime in again as i know he have done his share of RB`s Quote Link to comment Share on other sites More sharing options...
Kristian G Posted March 14, 2015 Author Report Share Posted March 14, 2015 Fault actually was the faulty wastegate ocillating, even if MAP as measured in the intake manifold was steady the airflow wasnt. Quote Link to comment Share on other sites More sharing options...
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