'84 G-body with carbureted CCC

[gerhardr@yahoo.com]

I drive an '84 Chevy El Camino, factory 305 with "Computer 
Command Control" and E4ME QuadraJet carburetor.  Carb has a 
TPS and a mixture-control solenoid, that limits the opening of the 
fuel rods in their jets.  The solenoid energizes to close the rods in 
the jets.  The ECM tries to use this to keep the mixture as lean as 
possible for economy and emissions.

Being one who always likes to tinker, I'd like to throw this out. <g>

I know that injection would make a very, very sweet 305, and after 
reading up on the TBI pickups, I'd like to try it.  I would like to 
transplant the TBI system from a wrecked '87-'91 pickup into the El 
Camino.

1. I know the ECM will have to be swapped.  The two ECMs simply 
are not the same.  For instance, the one the car has does not have 
nearly enough connectors for a "747" ECM to work.
1.a. The ECM wiring harness will have to be swapped, but it's 
accessible.
2. The car already has EGR solenoid, AIR solenoid, TCC hookup, 
EST distributor, coolant temp sensor, BARO sensor, VSS, O2 
sensor, and MAP sensor.  I checked, and the values my O2, MAP, 
BARO and VSS give are what a "747" would seem to expect.

So most of the sensors would seem to be covered.  Of course the 
throttle body will have a TPS, and will need wires for injectors and 
IAC.

Electric fuel pump... got that covered, I think.  Plumbing a return 
line into the tank will be a small challenge (OK, a big one - I have 
no clue).

I suppose my questions are twofold: are there any "gotchas" I'm 
about to walk into unknowingly?  I know I'll need an ECM and the 
*complete* engine harness, including all connectors, to make it 
work, but is there something obvious, besides the fuel pump, that 
I'm missing?

Second, will the performance from the injected engine pay me back 
for the time, money and effort?  Can I reasonably expect *any* gas 
mileage increase?  Engine's dead stock, good compression, 
cranks easy.  The car gets about 14 mpg with an easy foot in town 
and 20 mpg on the open highway.  I know I should expect *instant* 
throttle response compared to what I'm used to, but what about 
gas mileage?

Thanks.


   - Jared Ryan [gerhardr@yahoo.com]
  ICQ #8547412 Yahoo! Pager gerhardr
"Lead, follow, or get out of the way."

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