injector secrets - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

dinga · 03-24-2003, 20:36

hello all,

i have heard whispers here and there that there are a number of things that can be done to the fuel injection in the falcons that improve their power output quite significantly. Does anyone have any idea what can be done to improve things as far as injection or injectors go????????

EDXR8 · 03-24-2003, 23:05

The fuel injection and injectors in falcons are very good in stock form. Only minimal gains, if any at all, can be made using piggy back computers like unichip etc. Only engines with substantial modifications will see large power increases with computer or injector changes.

steed · 03-25-2003, 01:31

Fit a higher pressure regulator.

EDXR8 · 03-25-2003, 02:49

Fitting a higher pressure fuel regulator is a waste of time unless you need extra fuel due to modifications. With the higher fuel pressure, the engine will start to run rich. The O2 sensors then pick this up and lower the pulse width of the injectors to reduce the fuel and negate the higher fuel pressure.

dinga · 03-25-2003, 14:24

as far as mods go all i have is pacemakers, exhaust, king dragon filter, crow stage 2. will an xr6 fuel pressure regulator make any difference???

NZ · 03-25-2003, 17:38

Quote:

Originally posted by EDXR8
Fitting a higher pressure fuel regulator is a waste of time unless you need extra fuel due to modifications. With the higher fuel pressure, the engine will start to run rich. The O2 sensors then pick this up and lower the pulse width of the injectors to reduce the fuel and negate the higher fuel pressure.

The O2 sensor only works during lean cruise periods. During idle and acceleration it uses fueling maps according to the signals from Map, temp throttle position etc. Weird but true I thought it worked all the time as well.

ebxr8240 · 03-25-2003, 22:42

Look at the xr6 basically in this area it has higher f/p an adjustable one would be nice, make it more tunable.
Especially would be o/k with other mods.. But only if you need it!!

Kieron · 03-26-2003, 00:46

I'm not 100% on this, but I thought lean cruise is actually another ECU mode giving roughly a fixed 16:1
with closed loop holding stoich at roughly 14.7:1,
warm up (uses maps), acceleration (uses maps), deceleration (injectors off) being the other modes?

NZ · 03-26-2003, 00:49

Maybe its calibrated to run it at 16:1 . It will trim or lenghten the duty cycle according to engine conditions.