I have a 07 manual trans versa s with 104K miles. It idles up and down when its in neutral.
I first checked all hoses for crack or vacuum leak found none.
I clean the original trottle body assemble and perform the relearn technique No fix. So I replaced PVC valve, 4 spark plugs, new trottle body and perform the relean technique . The car still idles up and down.
Does anyone have any suggestions?