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Random Lean/Rich conditions

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Old 01-10-2018, 06:39 PM
  #1  
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Question Random Lean/Rich conditions

hey guys,
I have a supercharged 1.6 with a brainneck style built ms3x
Aem wideband guage
wells vtps
everything else is stock

I am having this issue where the car is running great for too long and it decides to go either too rich or lean ;-;
I have included a data-log of the lean condition, it happens after about 10 minutes of driving, i flattened out my air density table to see if it helped my issue which it did...delayed
it to about 14 minutes before it goes full rich.... One instance while trying to figure this issue out the car decided to go full rich forcing me to just die and sit in a neighborhood for
about an hour before it decided to come back to life.... Im wondering if my issue could be caused by a stick injector because when I hot start it runs on what feels like 2 cylinders
until i can force fuel load into it and then it clears up any advice would be greatly appreciated because i have no clue on how to fix it
Attached Files
File Type: msl
lean issue.msl (3.84 MB, 82 views)
File Type: msl
lean issue2.msl (3.80 MB, 65 views)
File Type: msq
CurrentTune.msq (287.0 KB, 213 views)
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Old 01-30-2018, 07:06 PM
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Great help! turns out it was a dieing fuel pump that was thoroughly clogged. for anyone experiencing this issue, a bottle of techron fuelsystem cleaner will greatly aid in pointing you towards your issue, it cleaned up my issue and told me where my problem was.
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