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Yeah, but these are
the same wiring harnesses, connected the same way as on the dyno – and it worked
fine there. OK; its worth some further checking. It is always
something you least expect.
Good point, I keep forgetting you
ran this on the dyno with the same setup. So has anything in the system
been changed since the dyno?
Also, you might
want to try this test again. I've had
occasions in the past where I've noted a certain behavior, got all worked up
trying to figure out why it happened, then could never duplicate it again.
Is there any chance you just "thought" the engine got rougher when you turned
off the secondaries? Could it have been a coincidence? I know my
engine always gets rough when flying low over the bay
:-)
I can't recall if you said you
tried this, but try setting the staging point up to 18 and see if it still
happens. That will make absolutely sure that you won't be staged at near
idle. I think this would be the first thing I'd try.
My thought (guess) is that the EC-2
makes a lot more MAP measurements than it reports to the EM-2. If the
intake pulsation is causing the EC-2 to see wildly changing numbers, it
might occasionally go above 15, which would stage the injectors
intermittently. The EM-2 may never show
this.
Good
luck,
Rusty (still undecided about the
new intake scoop)
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