Over-tightened DIA bolts
My car had a vacuum leak and was idling hard and stalling at stop lights. I came home and watched every video I could find on the web and decided to dismantle my car before my husband came home. I replaced the lower intake boot and the DISA. The butterfly on the DISA just spun with no resistance. I cracked the intake manifold where the top left DISA bolt screws in. Help!
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