Re: 747 crossfire conversion question.

[Shannen Durphey <shannen@grolen.com>]

EVRV is EGR solenoid.
A11, D2 show tied together in the schematic on /incoming.  Connected
internally?  DVOM to ecm case would show that one.
I've been away from 'em too long.  Can't remember a smog pump on
350ci, 88+ ck trucks.  But there was an AIR tube that runs around the
back of the cylinder head in some... Can't remember what it connected
to.

I can't find the EAC solenoid.  It's in the archives, I've posted it a
couple of times.
Shannen

Bruce Plecan wrote:
> 
> Ok brain fade
> Why do they tie D14 to C15, and D15 to D16 on the 5.7s and 7.4s?.
> EAD soleniod?
> Did the pickups run a smog pump?
> EVRV, early vapor recovery valve?, charcoal canister?
> What's the deal with A11 and D2 for the MAP ground?.
> 
> Dual injector, TBI firing strategy normally fires the injectors alternately
> on every ign pulse.  This changes in different modes of operation, thou..
> 
> Grumpy
> 
> > > OK, I've had the 747 in the car for a while and everything seems to be
> > > working. I haven't had anytime lately to mess with it, but then I get
> sent
> > > to me the pinouts TC uses for their xfire conversion to "90s computer"
> and
> > > notice that D14 and D16 are exact opposite of mine. I used pinout sheets
> for
> > > the stock Xfire and 747 to match everything up, but connected the
> injectors
> > > the way I did based on the wire colors. So what I have is D14 for the
> front
> > > injector and D16 as the rear. I guess the question is do I have it right
> > yes
> > or
> > > do they,
> > yes
> > and does it matter?
> > no.
> > What effect will it have if I'm firing each set
> > > of runners off by a few ms?
> > They're not firing "off", because they were never synched to fire
> > "on".  They just shoot fuel.  Try snapping the tps a couple of times
> > and watch what happens to the injector pulses.
> > Shannen
> 
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