There is definitely some noise interference when the engine is runnig. Maybe the PCM grounds are not good, or some other wiring. The PCM should get only grounds through the wires and should be isolated from chasis. Interesting only data for 01 message is corrupt the broadcast messages that follow immediately are good. May be related to patch in some way.
Causes could be, patch, baud rate problems at ftdi chip due to noise.
Or some wiring problems.
I should look first at aldl cable first, than wiring and grounds.
What model aldl cable are you using. I ve seen some ftdi chips that just dont work, or work sometimes.
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