That connector goes to the mass air flow sensor. While the engine may start without it, and may even run for a while, it will not run well or for long without it. That is the main mixture control sensor. If the engine runs at all without it, it is only in a "limp" mode. Just my opinion, but I think those K&N filters are a waste of time and money. The improvement that they will make in airflow is more than offset by the computer programming in the PCM.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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