Pressure Regulator

[Walter Petermann]

Mike,
these statements are incorrect:

"Now the injectors on a Ford open and close at one speed that never 
 changes. 

 So to get more fuel to the engine when the injectors are only opening 
 and closing at a certain speed you have to change the amount of fuel 
 pressure in the manifold (rod)." 

I have a description of the Ford EEC-IV port fuel injection and
CFI throttle body injection*. Both change injector on time depending on 
sensor inputs.

They only electronically adjustable pressure regulator I am aware of
is on the Bosch KE jetronic. It replaces the old 'warm up regulator'
and is controlled with very small currents ~ +/-10ma.  

 Walter

*Chilton's guide to fuel injection and feedback carburetors 

Mike Turner wrote:
> 
> The page at http://members.tripod.com/~jbabs714/index.htm describes Ford
> and GM FI in very simple terms. The statement is made that Ford varies fuel
> pressure and keeps injector pulse width constant. Is this true and if so,
> for what models (potential source of variable fuel pressure regulators....)
> ?