eec-iv question

[Scott Shotton]

TWright669 at aol.com wrote:
> 
> Hi,
> 
> I have some practical questions about the EEC FI system that I was hoping
> someone might have the answers to.  I was thinking of modifying (as slightly
> as possible!) an eec FI system to work on a non-ford engine.
>   My motor is a Jag 6-cyl and the old L-jetronic system has gone haywire,
> therefore I would like to replace it with something better.  I was thinking
> the FI system off of a 3.8 or 4.0 v6 would be a prime candidate.
>   The Questions:
>
3.8 might be the best choice for two reasons:  1. 4.0 is EDIS  2.  3.8's
blow head gaskets and were put in more vehicles (Taurus, Continental,
T-Bird, Cougar, Sable, etc.)  I'll bet you could find all the parts in a
junk yard.
 
> 1.  I would not need nor want to use (for simplicity's sake) the VSS,
> EGR,BOO,ISC,CANP, or any other non-essential part of the system.  I want it to
> be as simple (i.e. reliable) as possible and make as few modifications to my
> car as possible to accomodate these things.  Would the EEC go into fits if I
> simply left these things disconnected?  Am I going to have to break down and
> pay $250 for a custom chip that disables these features?  (I'd really rather
> not!)  Is there any way I can get around these things without programming
> anything? (I have NO programming skills.)
> 
The sensors/actuators you would need to include:  O2, TPS, MAP (orMAF),
Injectors, Idle air bypass motor.
Excluding EGR and CANP components would set codes and turn on the check
engine light.  They may not effect the function of the vehicle (besides
the obvious: ie no EGR=ping & NOx)

> 2.Does anybody know what the PIP from the 4.0 (EDIS system) looks like?  is it
> 28 pulses per revolution or 3?  If I used the system off a 4.0 I would have to
> simulate this signal.
>
The pip on edis is something like 28 pulses.  It is an analog signal
generated by a permenant magnet generator @ the crank.  One tooth is
missing to signify #1 TDC.  The module sends pip to ecm.  ECM adjusts
and returns SPOUT.  The voltage spikes generated by magnetic field
collapse induce a voltage that is read by the ecm to monitor the
ignition system for problems (IDM..Ignition Diagnostic Monitor).  The
PIP signal is a variation of a sine wave.
I'd probably stick with the 3.8 distributor setup for simplicity.
 
> 3.(this one is a longshot, but I'll try anyway)  Is it possible that the EEC
> would run with just the IDM (tach) signal? Even in just batch-fire mode?  I'd
> really rather not even use the computer controled ignition timing if I can
> avoid it, because then I would HAVE to buy one of those chips, cuz the Ford
> timing would be ALL wrong.  Also, I would not have to modify the ford
> distributer to work on my engine.  Actually, If there was a way to program the
> computer to ignore the PIP and SPOUT and use only the IDM for timing the
> actual fuel-injection, It would be worth buying a chip!
> 
I don't know if it works that way.  But, if it does, (asuming you
already have electronic ignition) you could use your existing spark
trigger or tach output to do the same, why worry about the 4.0.

Hope I helped.

Scott