vividracing

It seems like a power delivery issue rather than an ECU/safety feature problem. Even if it doesn't fix your problem, you'll have a new battery. Although, I'd recommend testing before throwing parts at it. Just because you're getting 14v at KOEO (Key on engine off), doesn't mean it's putting out 14v (or enough amperage) when cranking. Get the battery tested. Autozone does it for free.99

You could always try a jump box, hooked directly to the battery terminals. The only reason you'd be having issues with the battery + jumper cables would be from resistance, in my opinion. Now that I mention resistance, check all of your grounds! My 240 did this same exact thing after I had it in the shop. Turned out that the tech put a new ground cable in when they installed my battery, and it wasn't tight. I Dremeled the paint off the ground area (batt was in the trunk), reinstalled the cable and tightened it down and never had another issue.

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