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Question to all the gurus out there.
At high speed (100km-120km )my 740 wagon starts o hesitate not much and not very violent but it bucks and you feel the hesitation for a while, till you let go or speed up. I have had suggestions that it may be a cracked vacuum hose or bad air filter . Did the air filter got new K&N filter new plugs oil filter and still the problem any suggestions. How do I check for broken vacuum hose. This is the wifes car , its in awesome shape and i want to make the wife happy .
Thank you
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