Could really use some help

[gc73]

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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I have looked at the MAP but have not tested voltage to it to know for sure weather it is dead or not. i do know that it is getting good vac.

I have not pulled the injector to check those screens. I will do that.

As for when it has power and when it does not it is very hit or miss. sometimes it does at WOT, at low RPM's doesnt really matter how much throttle you give it until you get it over 3k. typically i have to pump the throttle peddle to get her rolling. sometimes she will run like a champ and others you feel like you have to either get out and push or rev it up and dump the clutch to get it off the line.

I have not checked Fuel pressure yet but did have the regulator out. All in all it seems like it is running very rich and not starving for fuel but i would definitely say it is bogging not misfiring. makes a bogging noise through intake if you have the rubber boot off from filter to manifold and run the throttle with you hand on the TB.