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Message: [QUOTE="mandkole, post: 1507936, member: 4630"] Does anyone know exactly how the J3 port on the pcm interacts w the pcm? I need to get more serious on figuring this out. Still hassling with random (usually cold) poor starts--either a heavy romping or a heavily late timing/smoke show like the whisper tune that's on the chip. Got good clean connections on the j3. When it defaults to the 'whisper', the chip switch does not function and it's like it's 'stuck'. You have to disconnect the batteries, unhook the chip and reset the pcm. However, I can pull the chip and it will accurately start every single time. Kinda unrelated but the batts never have more than 12.3v in them and could be getting tired. Once the engine is warm and has been running, it's just fine. I've been procrastinating on some new tunes and should just get a hydra--need to figure out if it's a hardware issue. I've considered trying to start the truck w chip installed but the switch disconnected. Just don't want to fry the pcm lol... [/QUOTE]

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