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Got the bench harness in, same result. Does this indicate a problem with the MPVI2 or the PCM? I'm really not thrilled about having to buy more credits simply to try this again on the spare.

Something screwy with this PCM perhaps. 25 volts seems a touch high. Any got a spare 512k PCM they want to loam me? 97763

Here is the log where it randomly goes CL. 9774297743


Should be impossible right? I read the tune back and looked at it in Editor, it looks like everything wrote correctly.

Thanks for the input. I went ahead and ordered a bench harness kit.

I'm running in OL because of some strangeness in the narrowband O2 sensors. I replaced the Bank 1 sensor with three different...

Previous owner did the swap. Looks like a cleaned up Fbody harness. That would be slightly annoying, but I'll do it if that's the only option. It's strange that it worked that one time.

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First off, love the product. It successfully solved some issues I had with the car and now it's 1000% more drivable.

So far I've only been able to successfully write a tune two times. First time...