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HybridZ

Weird fuel issues. Video for description.


Watson

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Real quick, the car runs well while the engine is cold/warming up but leans out a lot at running temperatures despite an extreme fuel increase in the VE table. Also, there is an intermittent fuel cut that I can't quite figure out. I have also tried adjusting the VE table with and without O2 correction and I still have a lean mixture. Please see the video for more information.

Edited by Watson
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You might summarize the video in words. 3:47 is a long time.

 

Curious, you can see injector duty cycle right?  What does it do?  Is there lots left?  Then there's always the old basic of fuel pressure.  Might not be an MS tuning issue at all, just the typical Z fuel supply problem.  The intermittent fuel cut, if you mean engine loses fuel supply for no apparent reason, would fit the crud-in-the-tank scenario.

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Thank you very much, Matt Cramer! That did the trick! I also swapped my 160 degree thermostat for a 180 so the car could actually get up to temperature and now I can successfully utilize the the VE table and O2 correction along with Auto Tune. Everything is moving right along. Thanks.

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Just a note, you can run tunerstudio's auto tune with a 160 thermostat. To do so, please go to advance settings (the tab next to Status in the auto tune window http://i603.photobucket.com/albums/tt119/isacaraujo/megasquirt/02c31d62.gif) and update the minimal CTL.

 

You're right, but that in conjunction with a three row aluminum radiator means its very hard to get past and stay past 160 degrees.

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