Your Welcome!
Also forgot to mention,(sorry), replace that 'shower tube' with a correct size piece of vacuum line.
-The loose fitting is a potential area for 'unmetered' air - read not 'seen' = no signal to ecm= no inj
pulse width increase net result lean mixture.
And,
Repair all exhaust leaks !!! -any- exhaust leak will dilute the machine sample, simply put, sample is lean
Engine is not running lean.
Finally,
Change the fuel filter!!!
P.s,
Might be worth a few calls to Your buds in NV( tools etc)