Starting to Learn on 95 G30 5.7 for Towing

[donf]

I am still having big data errors in Tunerpro RT KOER. The program seems fairly stable KOEO. I figured I would post what I have done and maybe someone else has some ideas.

I tested most of the grounds by doing a voltage drop test between the negative battery terminal and whatever the ground point is I am testing. Both ECM grounds were checked at the computer and a test wire was run directly to the negative battery terminal to see if that would improve anything, it did not. Other grounds removed and checked were all four grounds that bolt to the engine, buss bar ground under the dash and the chassis grounds at the front of the chassis.

The ALDL was tested for power and ground.

I checked A/C voltage at the battery to test alternator. It passed with .1v A/C. Removed the belt from alternator, no change in symptoms KOER.

ECM I swapped in another 427 ECM from a wrecking yard complete. No Change in Symptoms.

I rolled my desk top computer outside hooked the aldl cable to that and used that instead of the laptop to eliminate the possibility of the cheapo laptop having something to do with it. No change in symptoms.

I have added the wait for silence to the macro, also adjusting the time from 20ms to 900ms. The longer wait time does slow down the errors, but it looks like everything is slowed down, good data and bad. I put the macro back to original.

I bumped the latency on the USB Cable port from 16 to 32, no change. Tried latency a 4 and 8 also. No changes.

KOEO o2 seems to vary wild at times not sure if if its a true reading or not. I unplugged the o2 just to see if that would affect the Tunerpro symptoms, no change in symptoms. KOEO with the 217.adx MAT reads -40 and never moves. I don't think my van has a MAT though? I looked for one. If it does I can pull that and check. KEOR that data jumps all over. at times

I do see Moates sells something called ferrite beads. http://www.moates.net/ferrite-bead-f...ble-p-203.html It describes the problem I am having with errors while running. Has anyone had these solve their data problem?

I am running out of Ideas, but I did see here where another member changed their plug wires and eliminated their KOER data errors in Tunerpro. My existing wires are fairly new, Napa lower line wires nothing special, but it's almost wild guess time now. Anyone have an idea?