Finally replaced fuel Injectors

oknopa · Oct 23, 2023

After constantly P0301 and P0174 finaly i changed the Injectors one Bank 1. last year i posted the error messages and after change the sparks pklugs, the wires and the coil pack, just the injectors are left. Last week finaly i did it and now the Trac runs freaking smoth. No stalling in the lower rpm's no flashing yellow light. and the gas milage came from 13.5 to almost 18 miles per gallon.
I still have the P0301 error in the reader and i delete him. I self thin k is it some electro miss ground.

I am looking to replace the electro connection one the wiring harness, ( see piture 3) and the Intake manifold vacuum tube connector ( picture 4)

So far so good, now i think i need to replace some underneed gasket. I have small very little red drops ander the trac. I think is the transmission gasket.

DILLARD000 · Oct 25, 2023

Good work on those Injectors; have cleaned mine but still running originals at 260k+ Miles;
considering your improved mileage, perhaps I should renew them also!

Be sure to inspect the TransCooler ATF Tubing+Hoses+Clamps; notorious leakers,
especially the Tubing~Hose transition directly under the Radiator.

Could try swapping the Cylinder1 Wire with another; see if misfire moves with it.
Could pull the Plug & check its color & gap. What plugs+gaps did you use?
V6~4.0L~SOHC is known for not tolerating non MotorCraft or OriginalMaker AutoLite plugs.

Your 3rd pic above is the 2wire harness connection for the KnockSensor (glorified microphon),
mounted in Engin block valley under IntakeManifold.. Connector wires commonly get frayed\broken.
A new KnockSensor with new short 2wireCable+Connector is the fix; need to remove Manifold to get to it.

Your 4th pic above is the mini HeatExchanger for 5/16"Coolant PCVValveWarming Loop;
consider deleting that entire 5/16"Coolant Loop, along with the associated 5/16"Hoses & the
5/16"Coolant 'OxBow' around the PCVValve & the 5/8~5/16~5/8"Tees in the 5/8"Heater Loop.
This 5/16" Coolant Loop is useless, certainly in warm climates; only a potential coolant leak;
been running without it now several years in both <0deg Winters & 100deg Summers.