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21/10/2021 6:23 pm
Topic starter
Just started having this issue
2015 malibu lt 2.5 Jerks at steady speeds between 20 and 40 mph car has 140k miles, transmission shifts fine this only happens when i stay at a certain speed. could be 20 35 or 40, no check engine lights car runs fine other than that.
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21/10/2021 8:15 pm
When did you change your trans fluid and filter last? Supposed to be around 40K miles.
30k miles ago
spark plugs changed 35k ago
Update on my issue, the vacuume leak was caused by an stuck open evap purge valve. less than $ 30 at the part store. i tested the maf sensor, checked all hoses for leaks, intake manifold and the only thing i could think of was the purge valve..
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