2nd try about injection...

[Mike Wesley]

Clare Snyder wrote:
> 
> >Anybody have the schematic for the GM 3 wire sensor? I have headers on my 84
> >Monte Carlo and I'm having trouble with the sensor cooling off and I want to
> >wire in a heated sensor. Plus, can someone explain the different types of
> >sequential injection? I've heard that there are a few different types
> >(phased? and true?) I understand sequential inj. is fired in firing order,
> >and I'd like to set up a sequential injection on my 69 455 Firebird, but
> >since I have no experience in sequential inj , I would like to use the
> >minimum amount of extra sensors specific to sequential injection. Any
> >suggestions/comments/ stories on how someone else put sequential injection on
> >a old dinosaur?
> >TIA,
> >Tom
> 
> Use a HEGO from a ford 5.0 litre. Black / lt green wire is ground. Dark
> blue/light green is HEGO signal, and grey/yellow is 12 volt fused power on
> 88 lincoln.
> On 4 cyl 88 stang, hego signal is lt grn/purple. On 88 3.0 and 3.8
> Taurus,fused power is purple/orange, ground is black/lt grn, signal is dk
> grn/purple.
> >

Those would be vehicle wiring harness colors.

The actual HEGO wiring is:
Black: Sensor Output
White: Heater (+/- doesn't matter)
White: Heater (+/- doesn't matter) 
Gray:  Sensor Return (GND) 
If you use a Ford 3 wire sensor, it won't have the Gray wire as it uses
the case as GND.

Mike....