A leaking injector will most likely not be picked up be watching fuel pressure.
But could be watched by using an ignition scope. A "proper tech" would know how
a rich or lean mixture will effect the voltage out put and time of duration of
the coil. Being that you have a "pickled herring" would know that.
Real easy to see by a number of symptoms, but in the real world not likely.
Have for 30 years. You claim to be a Ford Master, forget the lesson on basic and
advanced ignition? I thought your were a master, that's what you claim. Are you
going to claim that an over rich or lean mixture is not going to affect the
scope pattern? Is that what your saying? Are you going to say that only
electrical concerns will change a scope pattern? Are you going to say that you
can not see with an ignition scope high or low resistance in the secondary
circuit? Are you going to claim that fuel mixture, among other things like
relative compression will not affect the pattern on the scope? So come on girl,
show how a scope can not show a mixture problem with a cylinder.
A leaking injector will not show up on a running engine with a gauge, the fuel
pump has more than enough flow to make up for a leaking injector. A fast
discharge of fuel pressure on a engine not running is not inclusive of a leaking
injector. The fuel pump check valve could be at fault, just to name one.
The fuel pressure leaking down is a false premise introduced by
The original problem is that the truck is running rich.
I can think of a whole lot more productive ways to approach a
rich running engine than by using a fuel pressure gauge to watch
for pressure leak down, especially since there is no complaint of
extended crank time on start up.
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