Thing is the frequency of the "waves" you see is too low to be actual per-intake-valve opening pulses.

 

What are your EGO settings? I found that if mine were set too aggressive I'd see some waves in the map signal during cruise as MS tried to correct the mixture. Try turning them off and making another log.

 

I have no idea what they are actually, unless Ben or Jerry touched them they're as per the base map. I'll give that a shot too, thanks!

 

Here's the EGO settings as they were. I'm guessing to disable it, I just zero out the authority block...

 

Step size = 0?

 

Yes it is, but I don't know what that means.

I tried the smaller line now, tried disabling EGO, didn't work. My last hope now (of the things suggested thus far) is to move the source. I actually did that earlier, but my computer crashed just before I got on the PCH to log. I did notice that the waves seemed to disappear, but in their place I had an off-the-charts lean cruise.

 

Step size determines how many percentage points the EGO algorithm adds or subtracts at a time. For instance, if step size was 2, and you were running lean of target, the MS would add +2%, wait 72 cycles, add another +2%, etc.

Zero is not a valid entry for step size. I've never tried it, and logically it should disable EGO correction. Normally, I run 1 in that field.

This is a very insightful observation. It suggests that either the previous location or the new location were not giving you a true vacuum reading.

 

Okay cool, now I know!

Another thing worth mentioning, when I pulled into the driveway the final time, I popped the hood and began to re-arrange the lines some more. When I restarted, the car wouldn't idle and megatune showed 98 MAP.. I had cracked a T fitting. So, maybe the last run with the lean cruise had a faulty signal.

 

thatll do it.

 

So, update time. I logged some more today to cure my newfound leanness. So far, after running VE analyzer a few times, there have not been any more waves!!!1!!11!!one!!!

So, maybe the issue before was that the T fitting that broke wide open had a hairline crack before. Or a combination of that and other factors. I'm now running the smallest line possible too.