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Could a timing chain being off by 1 or 2 teeth cause knocking loss of power loud roar from the throttle body at hwy speeds even though you know spark timing is set correctly on '90 3.1 Lumina APV?
Wiki User
∙ 18y ago
I doubt it. How do you know the roar is from the throttle body when at highway speeds? Is the knocking a heavy metalic knock or more of a marbles in a tin can sound? Is the snorkel tight at all points going into the throttle body?
Wiki User
∙ 18y ago
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