Last week I woke up to what I thought was dead battery. My wife's car wouldn't jump it but my buddies truck did, though it was slow to catch. Ran fine for a couple days. Didn't run it all weekend and had the same issue this morning. Battery tested fine but bought another anyway. It was 4 hearts old. Starter tested fine. Put starter back in. Hooking up battery I noticed some crud on the connections. Cleaned them off. Turned key, starter engage but had a tough time turning over, but it did start. Does this sound like poor connections? Anybody got any hints?