I zero'd out all the knock retard stuff on my engine. With the roller rockers and headers it was retarding the timing to the max almost any time the pedal was being pushed.

From my understanding,...

Yes, that code has nothing to do with the valve body or the VSS sensor. Did the speedometer work?

The code is referring to a 4000 pulse per mile VSS output on the PCM used to drive the...

I'm pretty sure if CATS software bricks it you're on your own too. Use EEhack and just make sure the battery voltage is good and the comms are stable.

It's all stock 96. As far as I know, it's never been opened. Came out of a burnt Z28 with fairly low miles. I've put about 10k on it myself.

I've been driving a car with a swapped 96 LT1/4L60e running a 95 bin flashed 8051 PCM for years now. No issues with the codes or limp mode and it downshifts just fine.

The PCM and harness came...