My Sub has been running like crap for a month or so and I haven't been able to figure it out. I checked the TBI yesterday and found that I am not getting that fan spray pattern at WOT on either injector. The both seem to just dribble fuel barely. I thought it might have been the TPS so I replaced it but that was not it. I am going to replace the filter later to see if it may be clogged but I need some advice here guys. Is it possible my fuel pump is weak? I don't have a pressure guage but Im going to try and rig one up. The truck will take off decently but will not gain speed too easy and if I floor it it won't gain any speed at all. It barely makes it up hills . Thanks in advance people. Eric L.