1991 K5 Blazer with 5.7tbi and sm465, all stock. While looking for an oil leak, I found this 3 pin roundish connector at the rear of the engine above the bell housing. It would be just swell if anyone can identify where this should plug in. It doesn't have much reach beyond right behind and beneath the distributor. And yes, I have both connectors plugged into the distributor. I am having acceleration issues up to 2500rpm when hot and finding this things home resolves that, I will just be ecstatic.