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I agree that the second
configuration in Normal mode (both switches on), you might expect the
secondaries to run smoothly acting as primaries (since they ran smoothly as
secondaries) - however, that would depend on their flow rate - if the
secondaries are higher flow rate (>460 cc/min), then it might cause the
mixture to be overly rich when acting as primary injectors at lower
rpms.
Yep, that was
my take as well. I just assumed that I didn't have the mixture adjusted
close enough in the "normal" mode, which is why I went ahead and changed the
connectors for the primaries.
You are
right, turning on the secondaries shouldn't have any effect IF the system has
not staged. Unless:
2. Your manifold line to the
EC2 is not carrying the appropriate pressure signal. IF it
were plugged, leaking or not attached, then the EC2 could see near WOT
pressure signal (29.92"HG) even at idle rpm and the secondaries WOULD stage
(regardless of rpm) and provide too much fuel at lower rpm.
I'm
accepting this as the answer for now, because it's the only thing that makes
sense. At one point, I did have my boost gauge line come off, and it is
T-ed into one of the controller lines. I think I noticed it
immediately though, since that's my only MP reference. I'm also 99%
sure I tried the other controller when it wasn't working, and that controller
it's own vacuum line to a different port on the
TB.
For the
record, the hose that came off would NEVER come off under normal use. It's
actually extremely tight, which is why I only attached it part of the
way. I have to pull all that apart in a few days to give the avionics guy
access to my encoder for certification.
1. First, make certain you know which injectors you
have (flow rate and impedance), otherwise your just guessing at what the problem
is.
Primaries- Denso -2020, 550 cc/min, 14
ohms. These may be higher than 550 if they're like
Al's.
Secondaries- MSD/Rochester 2013, 525 cc/min, 12
ohms. Haven't found an actual flow test of
these.
2. Second, I am fairly
certain that Tracy's default MAP is set for the 460 cc/min stock Mazda
Injectors. With these injectors the idle/low rpm is on the milely rich
side, the intermeditate about right, and the high rpm perhaps a bit
lean.
Agreed. Not at all surprised that my primaries
are rich. I'm also running close to 43.5 psi of fuel pressure,
which is higher than many people run. I'm doing it because it's the
standard pressure, and I want plenty of flow for the
turbo.
3. IF I did not know your background, I would
suspect that perhaps you could have a wiring problem in that the primaries
and "cold start" mode might be both on. That would cause way too much fuel
for low rpm, but might run (rough) at high rpm.
I
appreciate all the time you've put into thinking about this, but at this point,
I'd wager a large sum of money that there are no more wiring errors. I was
pretty embarrassed by the ones I had, and made damn sure there aren't any
more. As for the cold start, I turn it on to initially crank the engine
(probably don't need to when it's 100 degrees on the ramp), and turn it off
immediately after start. The engine responds do turning off the switch, so
I'm pretty sure that function is working, and that cold start is really
off.
4.
Have you put a manifold gauge on the vaccum lines running from your manifold to
your EC2 and confirmed you are getting the appropriate
pressure?
This brings up one of my
questions of the day. I have two ports on the TWM throttle body,
which appear to be exactly the same, except on different rotors.
Facing the EC-2, with the plug pointing straight toward me, and the transducers
pointing down, one line runs directly to the left transducer. The
other is connected to the right transducer, the fuel pressure regulator,
and the boost gauge. Which transducer is A, and which is B? I
guessed that the left was A, so I initially wanted a dedicated line, with fewer
chances to leak. Now, I'm thinking that I want the boost gauge on the
A controller, to know what it's seeing. B, as the backup, should get
the dedicated line.
There's also the
possibility that each port on the throttle body could be seeing something a
little different, but I'd be surprised if it's much. If the port with the
dedicated line was plugged, I'd notice that one controller works better than the
other, which isn't the case.
Hope some of this may help
Indeed is has been.
Thanks!
Rusty
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