95 3.0 issues

[dizman]

i have a 95 ranger with a 3.0 i have a miss when running i pulled the plugs and the center plug on drivers side is soaked in fuel and you can smell raw fuel in the exuast system. I changed all the plugs and plug wires and made sure i was getting spark in that cylinder but the miss and gas smell is still there. anyone have suggestions? could i have a bad injector spraying fuel? please help

 

[dizman]

will do but would a bad fpr flood just one cylinder?

 

[Big Jim M]

Swap plugs and wires with another cylinder to make sure them ain't the problem.
Big JIm

 

[dizman]

k i went and got a injector today and installed it while i had the upper intake off i decided to have my wife cycle the key on and its still pouring fuel into the #5 cylinder even with a new injector im gonna try a fpr now but wouldnt that do it with all cylinders?

 

[dizman]

the fuel pressure reg didnt help it i also noticed after i got a noid light that the #5 injector isnt pulsing but its remaining steady? ecm maybe im grasping at straws any suggestions would be awesome

 

[Rearanger]

Injectors have constant voltage, they fire as ECM grounds circuit. You seem to have grounded wire from injector. I'd first check that you don't have a bared wire grounding somewhere.

 

[dizman]

ok ill check that out also im not sure if its related but my speedometer and odometer have stopped working and im throwing 0305 code

 

[Ranger44]

I don't think they would. That sounds like the VSS in the rear diff.

Like mentioned before, look for a grounded wire. Get a wiring diagram and look for ground wires that run in the same loom. A continuity test will show which it's grounded to. It's tedious, but will work and prevent you from tearing into the wire loom.

I do know a CPS going bad will affect injector operation and cause misses. But just one? That I really am not sure of.

The FPR not fixing the problem didn't surprise me. It regulates fuel pressure to all, it would really affect one unequally. And a bad FPR would leak. It could have easily been checked.

 

[dizman]

well i went to my local pick=your part yard and grabbed a ecm from a 96 ranger with all the same options and installed it it seems that was the whole problem will update tomorrow after i drive it to work

 

[Ranger44]

A PCM "might" work. That is if it's a dead injector driver.