Could really use some help

[fixkick]

if not misfiring, then check fuel pressure.
given all this parts changed or checked.
the one thing a good engine with good EFI needs first is fuel pressure.
and is not monitored by the ECU.

and the 10micron injector screens, the single injector comes out, did you inspect this? and see them? (bad fuel in the past can pack and injector, its 4times smaller media sizes than the filter.
i need to know when it has power and not.
the engine,power.
does engine have full power WOT>?? or only has power lose at other times, if its really bogging , not misfiring, then that is low fuel pressure , injector clogged.
or the map is dead. tool.. The map is the key sensor on all 8V .
the map sets the demand for fuel.
then the injector injects based off the map,, the ecu use the map to compute AIR FLOW in to the engine.
if the injector is ok then FUEL pressure is next. Fuel pressure can be low, with clogged filter, weak pump or FPR that sticks open, we measure pressure, and let fact tell us what is wrong.
not parts changed, ever, seen many bad new parts, I have.

the correct pressure running is 34 to 41 psi....
it's highest (pressure) at low altitude, to over come , normal air pressure. (1bar at sea-level.) this is the job of the FPR , doing that. it is for ALTITUDE.
as you go higher, up a mountain the fuel pressure drops , in direct proportion to the air pressure on your head. 1 for 1 ratio drop.

the FPR scale is on my FPR page.



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