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surging at low load at 1500rpm

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Old 11-11-2017, 01:31 PM
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Default surging at low load at 1500rpm

I have a problem with the car surging/bucking or whatever you want to call it. very light throttle and load. like trying to hold 1500rpm in 1st it gets into a rhythm and unless you dip the clutch it gets worse and worse. any ideas? car is a 97 with a vvt engine and rev ms3 mini.

I can attach .msq and go take a log if it helps.
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Old 11-11-2017, 01:33 PM
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msq file here
Attached Files
File Type: msq
CurrentTune.msq (274.5 KB, 37 views)
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Old 11-13-2017, 12:44 PM
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P.I.O. coupled with play in all of the gears, joints, and bushings.
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Old 11-13-2017, 06:06 PM
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turned out to be the vvt map. large changes in cam timing even at low load. fixed the map and now its smooth.
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