LS3 ECU Wiring Harness

[Jethrow]

OK, you guys will think I am crazy .....

So I tried most the stuff suggested above, I pulled all the cable to and from the battery, cleaned and scuffed the ends to make sure all is well, and nothing was helping. I was about to try jump starting the way sideshow said (I had tried normal jump starting before) but my leads were a bit short and hard to find good quality ones on a Sunday. (Where do I buy good ones anyways?)

So what the hell, the main change I had done before was to pull the plugs out, so lets put them back in.

And presto - good cranking speeds again!!! WTF??

I do not understand this at all, but for now it seems all is good again?? Till the next time