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04 Forester ...Surging ?

What could cause minor surging under a light load ? Usually its only in the higher gears ( 3, 4, 5 ) and only with light to medium acceleration....When under full its not noticeable at all.......The tacho does not waiver or jitter at all which leads my slightly inexperienced brain to believe its a fuel issue....Im just about to change the fuel filter which im hopin will remedy this....Could it also be the fuel pump ? And if so why is the surging not present under full load ? Thanks.....Dan

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Posted on Jan 02, 2017

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damo555
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SOURCE: car surging under light load

hi best bet would be checking all vaccum/boost lines as one maybe cracked or leaking

Posted on Apr 07, 2011

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