Has anyone seen this before?
It seems the voltages are completely beyond the realm of possible, but at the moment the spikes occur a p0300 shows up. And the spikes do not show up in the short term fuel but will show up in the temp, rpm, o2 voltage, throttle position and I assume the knock sensor reads it as a misfire.
My vag computer died so I am tring to diagnose with my phone. I have spent a couple days methodically testing system components and changing parts. I need some fresh ideas. The only thing that I have found out of sorts is the b1s2 occasionally flat lines and the comes back to life after a few minutes. I will test the post cat.
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