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lean spike slight throttle movement

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so to start off its a ls3 dbw decent cam haltech elite 2500 so just barley on throttle you apply a little more it goes super lean but if you go 100% its fine i cant for the life of me figure it out attached is a picture of a log when it has done it its at about 10 seconds in any help would be appriciated

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Sure looks like a fuel cut. Does your fuel map (or MAF transfer function) have a hole in it? Are there any conditions that would cause a fuel cut (like decel fuel cut off or gear change fuel cut). You will probably get more help if you post your actual data log file and your tune / map / calibration file so others can look at it.

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